Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1724cf08ca34549…

MALICIOUS

PDF

83.1 KB Created: 2021-09-03 10:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9818db634ef5890dfab4f4a788e7dabd SHA-1: 92a38e64e52df60e9aa0d4e2be31eef376504b0e SHA-256: a1724cf08ca34549bb8a42fc00c38bc8c6740364bcb8530099ba4a743b53f734
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=la+signature+%C3%A9lectronique+au+maroc+pdf PDF link annotation
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/bs7l04sd4538vp53734kn68p3u/xibugape.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/7tt1gbe1eilr44orvl46ovpf9f/73596975070.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3028b02790cc52887f597db52af60c1e/rapebepiwawefago.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fb526ada4188e445db15db350a4fb4ac/sowapazopador.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/95578444079.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/97653705807.pdfIn PDF document text
    • https://birudongker.com/contents//files/xidujujapesirumajowawug.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/43249978053.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/86250538400.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/59931322670.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/16023020112.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2874d063a.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/stjaqpfk141sk94nanrv5ojp50/54405152816.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/47002473016.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/27793377049.pdfIn PDF document text
    • http://zkpower.net/upload/files/91045053526.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acd908283e2---67457595556.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/73325070941.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/84697924556.pdfIn PDF document text
    • http://www.heksan.com.pl/file/29198629642.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/vitepafugenajutizof.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed36ee91c4---balixefubanabutazoxa.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/dogaxapaxirogose.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/namebirunabuduz.pdfIn PDF document text
    • 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_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 19248 bytes
SHA-256: 657b01c3cc3676eb4b82fc3b63c47d6b18d0cfe92a74555b88b4ffa1e620e784
font_02_sfnt_off000122af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AF 11320 bytes
SHA-256: ca585984e34a01ceca8d3c4c4fb0918d2895891a41aab9fe891626605284698a

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