Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7cc329c6d86a21…

MALICIOUS

PDF

85.2 KB Created: 2021-07-14 05:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9435fe6192df4fe3845a87cd999a91d3 SHA-1: 3492efa2ef6e8869f3d60cf8f1fa59463d45761d SHA-256: ed7cc329c6d86a21abc81d1e2c73cffce75011b536fc0b8f2ed8b6a676a7e086
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to external websites, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of embedded URLs and the nature of the links suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/gt1tr09pimk93sc3ulh7apa9bv/55675005862.pdf
    • http://vladjurnalist.ru/archive/file/72901403495.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/bfbe7df1f7ae0238b35fcad2906739e0/luxesikawareginugo.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/nkakqjlofojad0k4pm9kk4gi84/monudumekud.pdf
    • http://fittbike.hu/files/file/texefikekakugoguniti.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e6c153dac---48671588198.pdf
    • https://clove7.com/userfiles/file/zobuxu.pdf
    • http://clear-es.net/yamituki-n/uploads/files/59213665448.pdf
    • http://rentbucharest.net/images/userfiles/16398744399.pdf
    • http://jnnycc.org/userfiles/file/tifinutagusisifitekilalu.pdf
    • http://dogable.de/userfiles/file/vevinuzogoge.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210606134447.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f669b2b62d---melobirizakevofodufupuju.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7cc5bafc3---63149113635.pdf
    • http://immobilgold.com/file/fubaruwobirorofik.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/72669324042.pdf
    • https://www.hkha.org/ckfinder/userfiles/files/74341020298.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ojk09g715gsv7rbfcitq4pue65/81585793457.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160edbb6a68081---92842162117.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a733afbef50---webowikagebovusuxugizidu.pdf
    • http://chinalanpa.com/images/upload/File/minoleruzexomekoxelub.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/xedovugixativofarimebe.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e6276e729---bobewodikenaxezujabekexi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=not+for+profit+meaning
    • 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_off0000e9f7.bin
27d932aa95ea9b777d7875afed457c374e9c5ee5b9f5a2d24858e109c935880d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 10464 bytes
font_01_sfnt_off000101b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 16792 bytes
font_02_sfnt_off000119c4.bin
3b9643eab9402f355279e2be4a9eabcb925f2861082d9adc2e23fdf837c21a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C4 17472 bytes