Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd6e7a740a63f1c…

MALICIOUS

PDF

109.0 KB Created: 2021-06-11 20:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a8b3d6d939c406bf4ec5916ab6fac13d SHA-1: 9dc9abf481dd719d35a065dcac5c834ecaabe57d SHA-256: afd6e7a740a63f1cd5728480491368d13b178403778a7c9e3b792d689dbc14fc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://archism.ru/uplcv?utm_term=aao+madine+chale+atif+aslam+mp3 PDF link annotation
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/3cq15c1dkvrfkbb7puggfuc431/rateforefe.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078489a4f532---kafoleluxako.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/85103839343.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1d0421d6---74274823025.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/us1sd9o59vm6u6i4jt76gu10ae/54504180141.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/sowexudukagow.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ec76c3d13d39f294c7a04f94bf852290/98244201705.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/1uei45oi61fshvlp6q895pu3q4/dewodenunija.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608032b1a2c6d---sijosufifimu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac5d7d165f---27738048608.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d545f5e65afd84c50a18d303db431403/vudokutemum.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/38543403338.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/70c92cd2a7579d4be77cf4e2a011abcf/wirodi.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/warofedaponaw.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/fe36e8eba484dfa4bb52510f2ca7d08d/mesoral.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//fuwaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016f33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F33 30636 bytes
SHA-256: d1709a22cfed5e9bfe7af654c7f32c9ad88988505fc377dc9505710839e4025b
font_00_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 5452 bytes
SHA-256: 457cfb8c9874efc5c73b3462b46c53234c0f78a5ddd3b7fdca180beed5e92b0a
font_01_sfnt_off00013f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F66 2140 bytes
SHA-256: 289854c0292170102eeea8cd8d9fa039b7e5adf06f71653ea533c14c4e2d2c34
font_02_sfnt_off00014941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14941 11180 bytes
SHA-256: 9f4e4a7bed231087efa47a8c97144483771d90ba96e8cb82261317c3d8a5cb4d

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