Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b86c33c39f02dd…

MALICIOUS

PDF

90.9 KB Created: 2021-06-30 12:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b9cf2950274b4c154d90ae3835a51c91 SHA-1: de7640ed007e5c988b42e80d2f484562cd3a2255 SHA-256: 60b86c33c39f02dd525d031ca63c115ae3a0e723a3eeb26b15f39a47d4058caa
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to domains identified as disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://zovsh.com/Uploadfiles/files/vixozuvaxizuwiv.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b181fd9c388---moposudavovo.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/abbc511ec22a44045e67190001944558/nefawimo.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/84400459345.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f5706b43e937f4830eb4b2ef83fb360d/waverifugisifewabanisenax.pdfIn PDF document text
    • http://bjallstar.com/upload/file/podej.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021062109430070554.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee5766732a---46603010087.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2da15dbf2---vuworiroj.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dacec2fe6---3014104175.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/dabaxorejisitofulinexom.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/66106c790757e9334cdd2bc00c26e3b0/10437963333.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/retufokoreremabijidamuk.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/56446645210.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/nununok.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f24e4cee---63252870210.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bce6df30588---kaduro.pdfIn PDF document text
    • http://aimic.com/userfiles/file/rinujogelotivurina.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210511081057.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/fulamafonazag.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb843645b7---wixuleponovulefoperu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b6c42c599---nukifekaxofi.pdfIn PDF document text
    • http://anm-av.de/uploads/files/33857299614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=what+does+foreshadowing+meanPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 10832 bytes
SHA-256: 337edf286b63fc11961a60970b4a2099642ac4406ea90d2ea7006bf22ca6191a
font_01_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 17624 bytes
SHA-256: 3686e7e86aa7ebedd077fda10879ccbe42397549d15e3149a3f7cc5a843c262e
font_02_sfnt_off0001464f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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