Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2b8b969927ebc4…

MALICIOUS

PDF

165.1 KB Created: 2021-06-26 02:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcc3e33934a4b661b12f62a1850c7980 SHA-1: 1672436d449a6517cfbf7c3f025ae3f07a4b4e59 SHA-256: 9c2b8b969927ebc4102449d340bc6a3332beb86e14c9fbb50a95de56714b9fed
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://adamlegal.com/userfiles/file/53438532931.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/f0617a1180c5cab54bd72dd7863cd233/sovawekalurajanelutaja.pdf
    • http://antwerp-reefer-tournament.be/argt/files/45717366081.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c17cca6cb9b---13263597417.pdf
    • https://arhometutor.com/userfiles/file/mabusi.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/bss0dl0pi0960bjf7v05ffiob0/wamovavo.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/riferevajatuvugi.pdf
    • http://tcihk.com/userfiles/sodejejajiwojeg.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/pajexunajuwarawab.pdf
    • https://tskrea.com/userfiles/file/xewanozu.pdf
    • http://sugarfree-gelato.com/upload/file/19896427399.pdf
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/95ff95671c0319659c60e45ec8368be6/78739290601.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/10815168d1198357a3e0842e50641863/gafidejil.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075471aa9d24---tixikuwute.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5a7db955b---mimizetan.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/84df9a76e3a02bb3f58f7d5a4ac876b0/lotejowuwewewaf.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083a1dd6cc34---39490796408.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/runexoturojubejofolidaba.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5ed488c74aadd96d1e9c80dcb0c51094/viveledol.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9577b969b4b727f8a148fcd0a01b13a2/36422458683.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081a11985ab1---voketexonoka.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45d2b05c9---22874523088.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=beethoven+classical+piano
    • 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_off000222d8.bin
5c56648ad7437d6105c4796baec37bbdcac47c73e41bfb1d600ccbe83bc901fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x222D8 10488 bytes
font_01_sfnt_off00023aac.bin
5fa9d2577d48eb216af3799920c893612cc6a2a399cf5ac37e88212a3176c42b
pdf-font-stream PDF embedded font (sfnt) at offset 0x23AAC 21148 bytes
font_02_sfnt_off00026ecc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x26ECC 16792 bytes