Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb5b62ee3b46dac…

MALICIOUS

PDF

92.4 KB Created: 2021-06-25 16:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 429544566ae81fc069319e0fae33c530 SHA-1: 4d1ed9b0eddaa82aa8d47447e339811835762a03 SHA-256: adb5b62ee3b46dacc2ac0d0824daef580839e3193eb50ec32307b646e8c7c467
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sunnysolutions.it/uploads/assets/file/latotigovogitifufe.pdf
    • http://bhavalaya.org/ckfinder/userfiles/files/finisiwedo.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pe56p6fjtbobt2hemm67vprnno/57387776126.pdf
    • http://omonetach.pl/foto/ilustracje/file/rojumajudorumiko.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffae9bcf18---jinowakef.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8c5df9bc07fabd38f92616fb3e17395d/warupisutupagojefasis.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ada7ac893e3---bevinokedumex.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080446be7194---36367135483.pdf
    • http://upbfassadenbau.com/upload/file/72400635772.pdf
    • http://pk.mo/userfiles/file/sajoboxizewexokilinikal.pdf
    • http://vidol.nl/userfiles/file/tisoretoxedanakipenop.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a0e7f2686ea4ecf1bc35e147045ae3f/bikosisu.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/60408622010.pdf
    • http://bayanairag.com/uploads/userfiles/files/42067103304.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/feef1c94b976fac7f2c5f890e15ec5f5/ludowevojisedopomesixo.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ab10a0f992384f4333cbd55838275703/wapinotulefili.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=crying+out+loud
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b7.bin
2ee7fd820f7e2bba8d465d8f3be76e891fdb609deb9a2a5cce4750e60d861543		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 17324 bytes
font_01_sfnt_off0000edb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 16792 bytes
font_02_sfnt_off000105c8.bin
d534ba7646a9a2a9f87a7bc33cb60054ac1d11766b762e809672dfcf74409408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 10204 bytes
font_03_sfnt_off00011c7e.bin
d72698fa432bfc39b040c5087985885be36aeeadafa2f6e8ea9c0819ea71b8a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 3136 bytes
font_04_sfnt_off00012964.bin
b54ef7cf74b1749652d50f68b03adee699a9e4c1a0289c03479d301fca26b6a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12964 24308 bytes

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