Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5035a4ac535160e…

MALICIOUS

PDF

94.1 KB Created: 2021-07-24 09:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 706980a29ead418603f9741a93e3f8d1 SHA-1: 50920a047b11cfbc8a9fbd984ad1067564a5faf5 SHA-256: e5035a4ac535160e55db8ebb26c5b38aede806f4d482c59c7e10fc85f3c3c7ae
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing attack. It employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands or pasting sensitive information. The document also contains multiple links to external sites, some of which are hosted on compromised CMS platforms, suggesting an attempt to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fa-vietnam.com/webroot/img/files/pafovi.pdf In PDF document text
    • http://illinoislivestock.org/userfiles/file/74750994178.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/87533687129.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbac84bb4e---nawepopidutirusetazomafom.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/41d5ea7229d40587a9ceb46dbaf8af19/gezagutodogolapubow.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79abfe8096---3479929658.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/puvupekoxarusid.pdfIn PDF document text
    • http://newo.ru/files/files/62606947262.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/53tqvji9j4b70e5lbravsftd7g/66176580070.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/fugokig.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/d3uu88pdl9gjn7lo3b8avqka7o/34440380113.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/4b7ca776aff65e7ca06b0d2b655604c5/gixoku.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b82bbdde1---xepowovuto.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b2ccc105326701d13fe2ee3f656a12db/63583510307.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/saponakokabibamiwoji.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/si9ahujdng0uu9v3fajtfi906b/70262458028.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/71641121323.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087d9607a436---77831471902.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160799a7d39f4f---81010601555.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/komegugiwep.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/48fc348d9dea1fa31fb928f985bba852/95498852492.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/10506788582.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a9462d9ad---rolomokuxenemubozunuzek.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/tuxeju.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/39d1c1a4fccec31d560f3c7b6e3392e2/24965286470.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/sixirigejikekubobusafivot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+download+minecraft+pocket+edition+on+pc+for+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001224d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224D 17768 bytes
SHA-256: b67017bb0f850cfb9b2a790530095e8259ffdb2e6b0774a0b108402dabbc7a94
font_02_sfnt_off0001512e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1512E 10784 bytes
SHA-256: 27b638025d6ee4b6b3f1a020be899ae51ab4bb7499a873e53b324b463153f640

Open this report in the interactive analyzer, or submit your own file for analysis.