Malicious PDF — malware analysis report

Static analysis result for SHA-256 02901d0c37a103c2…

MALICIOUS

PDF

83.8 KB Created: 2021-07-02 09:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41e11987ed44192716e4213c8bb84a87 SHA-1: f9536bc379bb2d916723e2410d998e659ed5b87a SHA-256: 02901d0c37a103c2f7925e07d413d0082fa9dde48f7937d1855b55f571c5e1c1
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both strongly indicate this PDF is malicious. It functions as a link farm, with numerous URLs pointing to potentially compromised or disposable domains, suggesting an intent to redirect users to malicious sites for phishing or malware delivery. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/85418492090.pdf In PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/34f185551ce1ffb862f16bca9f6bdefc/pulovidinunalas.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/b6dvp6o7igd8idc9il1jub21ub/9304330080.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/xasusajovakiv.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/potuwijepuzapopetun.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/41476846983.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b0a0e51cf---32284009738.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084af58a3af0---dunojomexesojujabu.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/a169527760b525d07997864dc0cd387d/xevewapiledupatoso.pdfIn PDF document text
    • https://masihpt1.com/contents//files/15908967095.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3f92f654---dusigis.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/sewepigugodipaz.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7c39ce574---75025514052.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/nemoruwujob.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79d4cf7aa---sedadojisororod.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087378652344---62477741140.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/44176110309.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/543b69339c5868a8a57e65b123933e3d/48263608949.pdfIn PDF document text
    • https://bamor.org/userfiles/file/naremedetogafixewomes.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/9401138369.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/8385467388.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/174c31e59ea188aad07f7003ee368f97/maviriketoridu.pdfIn PDF document text
    • https://yuss.it/file/77731171345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=food+with+trans+fat+and+saturated+fatPDF 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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 10568 bytes
SHA-256: 7837c52c079cc4af8007c1f49a2bab51a352c6610e0e823623002a8d4735653b
font_01_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 16300 bytes
SHA-256: 4090b883f6e19ec1ab793527aee0816221d28fec68e8a27ad0d30e264caf7667
font_02_sfnt_off000129ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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