Malicious PDF — malware analysis report

Static analysis result for SHA-256 f696f8a90a7e2ea0…

MALICIOUS

PDF

85.2 KB Created: 2021-06-25 20:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10dac82422b15b20c5a099ecfbcecfc3 SHA-1: cd035e4bc66aab0aaa588cdc6da753c93c49e223 SHA-256: f696f8a90a7e2ea091d8437c1120c7e9340a74b611c288db747211e07f4e0f51
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that attempts to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sns.hu/_user/file/felalonenefo.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/69af9d03b6599a85c3447d16d1fcbb51/38724447481.pdf
    • http://cabinet-blin.fr/ressource/site-image/files/28155082862.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/3f5v2t0kmcuibfaa9nb18k3b5f/moravogomorokunuleb.pdf
    • http://amon-syotengai.com/userfiles/file/gilanemuveri.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/608d2c97412176e858c99d73ce434a1f/wowunetedod.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac410c9e015---jukokifoj.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd73cff32---86315153100.pdf
    • http://beastyenergy.com/userfiles/file/28703485293.pdf
    • http://alimentosldm.com/userfiles/file/roxabapokifo.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f7c3aa64---zevejisu.pdf
    • https://sambelteri.com/contents//files/79613951735.pdf
    • http://accronline.com/userfiles/file/xadilenuvugozuja.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d4bf8041d8f5d5d50da78b4253ffa369/pisusem.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/epalsh9ma525hm2p2g0fpsduph/mefofopafu.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3ce87889223fd0bb62f77ba0a3f29539/wopumujeb.pdf
    • http://lhsclassof1971.com/clients/74120/File/razetefolizom.pdf
    • http://driver-jazda.pl/upload/file/dexitusojolufefaxelal.pdf
    • http://dragonera.cn/admin/userfiles/file/96976860023.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3cdbe0d5---bijawifaxapabojezuleroki.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/o7d473metf18u7hmq22p1m3at7/duvegimudenutolose.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a46612d08d9---40173272945.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/49437764261.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=population+ecology+graph+worksheet+answers+key
    • 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_off0000ed14.bin
09cc290b07139ecbbff549ad150baf4c11482989f2b2f38c4b6a9de2ee093ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 15868 bytes
font_01_sfnt_off000115bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BD 16792 bytes
font_02_sfnt_off00012dd4.bin
735b1fb0e53bc886bb9311ccab17ed717fd119cc77d4f77c17e489a07b7d769d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD4 11048 bytes