Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0704a7b9a41f425…

MALICIOUS

PDF

87.9 KB Created: 2021-07-26 15:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bea0c7506061d4b63e6192e92f33a347 SHA-1: 600e50d312c63a8ae3ab48f01f3ce370e258b170 SHA-256: e0704a7b9a41f42518e5ebb3d19b8cd058657ea9a46a67cab780c32b5dc07092
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to distribute further malicious content or phishing lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096055599b0e---lupubaruwobotasule.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/480d99868b0f38d494073ef93e2c38f7/84391723699.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/37425673730.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609107748eee5---vadosifekemadavonatoboji.pdfIn PDF document text
    • http://mid-europe-ex.com/31991399410.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d38ece3d98---22062581224.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b2534150e---fatusalovugidugexu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/nusixarizamezenuragafi.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/xekulupesezokup.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/70a6410b40bd7294dce674c60626e224/32017024352.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160778536d7158---62581277173.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/92724350008.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/432762015283241dcab6301bd6d4f5f0/3554454820.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/cd8963e73808780b6c12b74abcd5b64e/57737329707.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/52324452037.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/dexowar.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60a08c1e9c---xudupo.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/vebev.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/fb526a95237b0804511b70028b4138fe/35221129379.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/52360839173.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/wanogusomilenaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+long+do+misdemeanors+stay+on+your+record+in+virginiaPDF 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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 11072 bytes
SHA-256: 4cdf819a930b498901ca958cb1d2a4be71fe6c3e8da03e2c0be3cd6e28f11ee6
font_01_sfnt_off00010c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12462 16352 bytes
SHA-256: d16bb7be61146a5b38a6b020a7788d7f1f5453281a080a72a4625e477a31d9a3

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