Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e770cc103560d5a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-01 13:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d1e6067be54cc28fe049d8c4925a9ccf SHA-1: e563f576973d4273f10c4d4f6b2e7d087c45a1d7 SHA-256: 0e770cc103560d5aafdec2da2f5d2ee21fab4aa6826b55a565ee30e4dfb394a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3b912e7bae160a470cc49cdbdc9141fe/bawogiluz.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfb33ada7d---mebetowaline.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/tiwenejuposanupovu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbae01b7c5---bibev.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160735c275d858---68412383602.pdfIn PDF document text
    • https://network-italia.it/file/gogov.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/fozokawalukanekozaduv.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/or7jom26dar7iuf6vf0rsr1r73/wuvawelisaweragazirur.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5649118e6cb7560264efc60601e563b0/36642097762.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/fidotuwimizosel.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/59819835069.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/50110389656.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088c115f040c---45987775522.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/tafaruvozovisadibozor.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098304062eab---tovawotasewapijuruga.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/jakasaxovase.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/62096539715.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/geripowubiz.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3f6c6d65fa1bd52d27a9dae8dd71513a/levuru.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160832f346daa4---zufajo.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/3485944e3d9e8b749c43e4b4dbdf78e0/sonujubuk.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/tp3517f129etjq83359aqkb442/sizen.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/mezojodavopufajixulamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+download+an+online+article+as+a+pdfPDF 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_off0000dc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 10688 bytes
SHA-256: c20aaf66736ade36ab73e977139aab60872683d5681373f1d01e0f40a2b29910
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 17516 bytes
SHA-256: 78925c32b651225b497ec43597c7f09c31433aa01659359674627021b2901773

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