Malicious PDF — malware analysis report

Static analysis result for SHA-256 120695bd669c4dbb…

MALICIOUS

PDF

84.9 KB Created: 2021-06-28 22:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d3c56321f5cd896118b595ecf3697d1 SHA-1: 1f08d126906173550fe4d89169b28c0e71a2c06d SHA-256: 120695bd669c4dbbe542c94e2df1223986c346f83241857fc1bf352b0053cdf2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to external sites, many hosted on compromised CMS platforms. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://philabc.ru/uplcv?utm_term=what+is+a+torn+calf+muscle
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6093930f93---4814174033.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd1827af2ddfe9844fa8a8b81f5b3d82/97286744140.pdf
    • http://anaminfo.com/attachfile/file/vuganepajivunoduzafamuv.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/d5dn6f40htn2tm2uqha65f0bi7/wopiz.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a91d6d34693---26127481087.pdf
    • http://soupworld.de/upload/file/verujubo.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec29c6a428---88213374635.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f92b76f7b---telasigukosakome.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099429d0cb17---20664773389.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/kukasedotoritinovutave.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a619871d547---toguruzovoz.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/7cbed94a4b1eb9cc117c94a0b21fe7d7/25868919194.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/8af29cb40ec914b02bd7d1e759c78adc/57195067291.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982edc3f148---24352348639.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4stnvlm4lekaqbkvr8461o7fsv/13401609410.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d974722238---39492950352.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/44101668503.pdf
    • https://artlabjo.com/userfiles/file/92367028613.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eaefd8622---xemufeveketewutiru.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077007908643---bufofefajepizowujofuxuda.pdf
    • http://compsult.net/userfiles/file/rinizakubifilodifojitudad.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee837a7ce6---zaneruzilivitej.pdf
    • 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_off0000ebfb.bin
cab3d419f010fdc2757ef180171af4bf714432efbcf0f50c2e928ff8291401a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 10692 bytes
font_01_sfnt_off0001045e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 16792 bytes
font_02_sfnt_off00011c70.bin
9a48eb658a01f1c976c48b6def4d972cadc6fc2198df1c2698735e0d78581f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 16216 bytes

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