Malicious PDF — malware analysis report

Static analysis result for SHA-256 8597badd003db759…

MALICIOUS

PDF

87.8 KB Created: 2021-07-05 06:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be39f580074e46a5ba3a30bfcf6c368b SHA-1: bcc99ff673ca0a9e015184c9d6cf81e2f0798089 SHA-256: 8597badd003db759d25cdece43e808f1c905a8f06c4600a87e81ac445c8840f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4baa84581---66880687017.pdf
    • http://orvosvalaszto.hu/uploads/files/81241267047.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079c7a4b19ae---lulijeliburelunive.pdf
    • http://amon-syotengai.com/userfiles/file/94679037789.pdf
    • https://etimes.mn/uploads/files/98525192813.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/6e0340f9993fafae52d2bb6488f70e2a/bopifiguxatuweputi.pdf
    • https://museuminiaturesbesalu.com/files/66635463791.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/e739df7f3eeefcebbd0033045d67e4f0/80543368868.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077acab95acd---81642720398.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/eaf1bad6c8ce46e5cd8b23157975354c/90261784852.pdf
    • http://anhopphat.com/uploads/files/mugobugojenomuxovefir.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/35519912893.pdf
    • https://digicpictures.com/downloads/budomikudo.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b6185d6152b8d82e4cc79fa4c4a64097/4896708767.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074c20fa799b---wabomelena.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607181f067ec5---45067495506.pdf
    • https://tkquiz.com/userfiles/file/69087847900.pdf
    • http://metabolit-plus.ru/files/file/watonavu.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160929e20bad7d---95634836790.pdf
    • https://la-klamm.org/Files/files/jogipetatutubibez.pdf
    • http://sattamatkapatti.com/userfiles/file/zijojugoguvukofax.pdf
    • https://tonwen.org/userfiles/file/guvalegavotuvinunutadu.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb28b51784---memojixoduvabuxewab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fallout+4+suggested+perks
    • 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_off0000f584.bin
90f5d1e02c19533f50d5f07b495808ef8b2e2d439934631fc029b7322e247d23
pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 17040 bytes
font_01_sfnt_off000121be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121BE 16792 bytes
font_02_sfnt_off000139d5.bin
8254e4f88daaf47b66003ea359fb0581a57ee52026f6295872d733175f8b5373
pdf-font-stream PDF embedded font (sfnt) at offset 0x139D5 10620 bytes