Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea332b71bad7253…

MALICIOUS

PDF

152.0 KB Created: 2021-09-02 22:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8a12dddd4176e1f281bdc05d2eabc69e SHA-1: 68ec32bca9b998ae8e5c1c6b3bbf002fbc31caa5 SHA-256: cea332b71bad72535fc6efaa87eb05299a82b9b113ea9d2c660de3fbfce62441
232 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple links to potentially compromised or disposable hosting sites, indicating a phishing or malware distribution attempt. The presence of heuristics related to password-protected archives and visual download lures strongly suggests the document is designed to trick users into downloading a malicious payload, likely disguised as a legitimate file requiring a password. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://bajcsidavidfoto.com/_user/file/favetugil.pdf In PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/bisusub.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/xukomizeti.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/zutekigotafuredafa.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/fixuxoxupare.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3503290419ccd149898d08e70a36d825/jolavovuwamajipatuni.pdfIn PDF document text
    • http://aimic.com/userfiles/file/zumunuxubobutav.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/4421768300.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/271bc46d130791783c1f93183dbee20a/bivusoxefulevobogabaz.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765b5e301b2---27433602306.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/ribanefulagogatunoke.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/xuvivexifetatewage.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/puvimejo.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/votugezusoxetunabarokejum.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b978f906e54---pugike.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/6284437043.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/15362895783.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a155f15033b---nanokamumukulajokusolok.pdfIn PDF document text
    • http://abpaluso.com/upload/file/41887158679.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/miboribovexewijin.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jaraxasomawekizixap.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/01c9f6e794162d9ac17a95b88bb8d45e/xavavedisazanutake.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/52859154570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=user+manual+honor+8xPDF 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_off0001f09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F09C 19020 bytes
SHA-256: 74071a1aa717d3f8496521d143d90cc736fbe47977b084a32cbeea5b893110a9
font_01_sfnt_off000221d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000239eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239EB 10600 bytes
SHA-256: 984e344c880b00a5c8abffa1fa67a822bde6e3eafc281f12e30797b2a6d1fa3a

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