Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e54a52deaf16302…

MALICIOUS

PDF

78.2 KB Created: 2021-07-08 08:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0a184330226d05c9353aefa07102667 SHA-1: 620bc94e36608af14e32d8499d4558b59f0b5bec SHA-256: 2e54a52deaf163023858b025fbe8e0c94f6d460a403b3c65ff55db77ea626395
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://firmykominkowe.pl/Obrazki/edytor/file/foxoxiditobufinimopi.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/riuv1ne96mkn0rmmlaejfcquv7/zunoginowimezimugosamulip.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c616e2789c9---bobeniwozukapuvag.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b393e44e---48424406671.pdf
    • http://dok-vo.ru/userfiles/file/75849216094.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21916366f2---zesub.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c74b89f29---49360788318.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d560a94c4f---59949490802.pdf
    • http://cayxaotamphan.net/userfiles/image/file/tewatizugiposoj.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b8e38462f7ce373a744e6920d7e64f85/38233233414.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905e25d1a56---60810265987.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4da96f8c74d631bcd45c1ac59dc1adce/21960200174.pdf
    • http://aweibel.com/Photo/file/39530278520.pdf
    • https://thokhoavietnam.com/upload/files/buwajajifaluwejosusujoti.pdf
    • https://a2designbg.com/userfiles/file/71862678618.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d35dfadf599---wopupofunizu.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676b5aab98---zufazoropafaru.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/45357566558.pdf
    • http://alphasigmaoverseas.com/userfiles/file/wuxujuripol.pdf
    • http://v-lukomorie.com/uploader/files/85620687453.pdf
    • http://anpo.vn/upload/files/92034669549.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083adc1c9c87---87712377590.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=platte+county+collector
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb9.bin
2446547283b1d0d07d48ab04745e48a9e9fdec69f5383b83e0578f459c9ef402
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 17048 bytes
font_01_sfnt_off0000fcaa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 16792 bytes
font_02_sfnt_off000114c1.bin
93c684ae7dedf6689b2ab73f492adb56e0b24581ca7724b8f0b961b10b4b7f28
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 10176 bytes