Malicious PDF — malware analysis report

Static analysis result for SHA-256 106a6acc2b77ca63…

MALICIOUS

PDF

68.0 KB Created: 2021-06-08 17:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a8e41838a6fab1965a19bb4cb3160c31 SHA-1: 8053c2e220cbd1564195d1cc8d87f24d28582d79 SHA-256: 106a6acc2b77ca634d6c0e46f03d5d81deb1d70ccf953cb3d95fee893469cb69
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to direct users to malicious websites. While no scripts were extracted, the presence of numerous external URLs indicates an attempt to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://pixomot.ru/pbw?utm_term=mechanics+for+bsc+first+year PDF link annotation
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/fae985a93e4b32.pdfIn PDF document text
    • https://megulotajisotem.weebly.com/uploads/1/3/4/5/134592592/7036850.pdfIn PDF document text
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/fivenine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_6044cbcdcb438.pdfIn PDF document text
    • https://xeronatorelej.weebly.com/uploads/1/3/0/8/130874120/1862048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_6050242062fa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_600235b222387.pdfIn PDF document text
    • https://voxiranadazezud.weebly.com/uploads/1/3/5/3/135312978/b8644140cf8.pdfIn PDF document text
    • https://domuvajedoxu.weebly.com/uploads/1/3/4/8/134847007/pukujugepejidiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_603869c5bc92d.pdfIn PDF document text
    • https://sisaweroz.weebly.com/uploads/1/3/4/5/134587393/e3eba4ad0607c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_6054affbf30ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezupagijene.pbworks.com/w/file/fetch/144870219/titepuzafel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5824c810-a920-4b2e-b58a-e8b4dba16b24/8712883563.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/serakazujabogumoruzab.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/clash_royale_hacked_app_ios_download.pdfIn PDF document text
    • http://sujabuno.pbworks.com/f/tudijod.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/f/4844752485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d32ab4-0ce6-45b9-8270-154aff772a0a/juegos_del_hombre_araa_en_linea_gratis_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b6e749-a82c-4c57-84c5-50edb10d054f/how_to_acrylic_paint_galaxy.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/60814118236.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9E 5184 bytes
SHA-256: 9a6af96590870a092e441ab98389f2527bb3e7628d4a53a673a6b96db35bc353
font_01_sfnt_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 10160 bytes
SHA-256: b6125e56fbbb7f25177226fe3f4de08713eadd5824d17309a835768b7c04b6d0