Malicious PDF — malware analysis report

Static analysis result for SHA-256 295ec7da6d52fedb…

MALICIOUS

PDF

82.4 KB Created: 2021-06-08 05:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9c6ab963bc6967bb51c71ad1ac4f3d1c SHA-1: bb379382088f1bcdc1b268d87e0b7d53b6b0b18e SHA-256: 295ec7da6d52fedb932bca0443e203790e5edb2d67c8adb90eaeabff6b066b57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://drafthe.ru/pbw?utm_term=download+lagu+symphony+mp3+wapka PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6054414adc553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_602454dc5806b.pdfIn PDF document text
    • https://kurokeduzuw.weebly.com/uploads/1/3/4/6/134693898/padozimik_kuveseralufa.pdfIn PDF document text
    • https://jolaxedepodoz.weebly.com/uploads/1/3/4/7/134708869/rifezun.pdfIn PDF document text
    • https://sexedevojaboto.weebly.com/uploads/1/3/2/6/132695366/9390379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_6052e265e1c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_603e67cad6e8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb449c7-5f39-4ed8-89b4-d83495a555d9/rezokaje.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144815202/sutevijedunepaxelamosu.pdfIn PDF document text
    • http://garigor.pbworks.com/f/24340751688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea4c5d2-bab1-4097-a896-d5c5016a1358/fifidoki.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/f/fusafug.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/79162907230.pdfIn PDF document text
    • http://xotokuwawa.pbworks.com/w/file/fetch/144699306/gopamor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308904bf-52bd-4191-b5fc-81ce0703f6d7/changes_from_aci_318-11_to_aci_318-14.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144822363/sevevavuzeferuzosamotig.pdfIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 5700 bytes
SHA-256: f469adba11733ffd44db3bf6d0c3c2d6282e11ffcdb6a862efb3d748f2e38ba2
font_01_sfnt_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 6872 bytes
SHA-256: 44b69d16b7bfcfa0996e6dcf5b3227c7781b3e3d5e47e448a79518d54f22ece6
font_02_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 11404 bytes
SHA-256: 51358c2ef00f78a55727b288cd3503c1cd183527401295ea1c0eacdc78e253ea
font_03_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 16300 bytes
SHA-256: 83f00574d6678615c84df08c7f5650e15fa6251457c7ea0c2ff64404b1ba14e6