Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7922da7ba4740f…

MALICIOUS

PDF

108.8 KB Created: 2021-05-26 07:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63383bcf8a6fd3548bdc8df39a07f5c8 SHA-1: 9655cc5be620157f6ed19ce8e2a622d7ef9b7bd7 SHA-256: 6c7922da7ba4740f04f800a30e379707038b9d649e476e78ab9547d663f75055
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 0.9994

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://seumenha.ru/strik?utm_term=aot+tactics+tier+list+2020 PDF link annotation
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/7475322.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/fuzutinesesir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fc96cba8cc9d.pdfIn PDF document text
    • https://fimezerix.weebly.com/uploads/1/3/4/4/134478386/8218248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5ffd82a2a715f.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/76bec85504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_604a9f6a5d87e.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/fitab_jakanotobi_vijixozut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5fe4b736ab6da.pdfIn PDF document text
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/7130181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_6041ce572ae1a.pdfIn PDF document text
    • https://kiziwovoxapi.weebly.com/uploads/1/3/4/6/134617524/gigenajofojuk.pdfIn PDF document text
    • https://ritiburup.weebly.com/uploads/1/3/0/8/130814353/xezisiludadumiluxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_6012dc3b138a0.pdfIn PDF document text
    • https://rebolaje.weebly.com/uploads/1/3/4/6/134696551/bef8d2e6d.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/9464c032-8208-4f87-bd63-4d868f90c065/cateye_astrale_8_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f72e4e-7af6-485a-920b-d459bbf19fa4/45674177074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a041b465-a1f2-445a-9b5f-8e4091d60a58/how_to_install_a_dishwasher_drain_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff0bbba-17f6-461b-80e2-7d68048cf4a1/teboponifipajubawixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1a9046-671f-449e-9506-a2ada37cec04/aprende_ingles_escuchando_leccion_2.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_off00014010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14010 5860 bytes
SHA-256: cf7eb2d4513186eea6b701bff14c70f079f386a46b450f9b119609feceb5e005
font_01_sfnt_off00015444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15444 5056 bytes
SHA-256: a728de60dc5dfa5d0cc83c0f3f620a8a6e36d7a7e3c9d8c95497fdf96861d888
font_02_sfnt_off0001657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1657D 12308 bytes
SHA-256: d39a339ba5094b6926696f4bf944b2377910f8237d587916198ae9200a79cd4d
font_03_sfnt_off00018f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F24 16308 bytes
SHA-256: bb0149d47aac2a7cdb8aafdc5b916d8dceeb793feef0c45b96b3a66c93d463d6