Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcfec97eb105522…

MALICIOUS

PDF

82.7 KB Created: 2021-05-20 12:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1384d287cd3acc9f5a81a06c1991a724 SHA-1: f6c3eedf350d99a93d2fe58e16d00c1e6c389859 SHA-256: fbcfec97eb1055221520e188c52eef47fc4f5bab03f48dccce0547e5638957ad
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The presence of a URL with a 'utm_term' parameter suggests tracking or redirection for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://lozipotod.ru/strik?utm_term=proform+540s+treadmill+belt+adjustment PDF link annotation
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/letawugoxipume_wasolavirokan_bovamul.pdfIn PDF document text
    • https://verulezame.weebly.com/uploads/1/3/0/8/130814285/tumexuwevozemunub.pdfIn PDF document text
    • https://sekotujuf.weebly.com/uploads/1/3/5/9/135960234/xivuwin-xosulusomov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_6067a92c1a615.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ffc559935eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_60288721bd28f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_605a4247a6660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6014f3ee522cf.pdfIn PDF document text
    • https://kikurebimeko.weebly.com/uploads/1/3/0/8/130814200/b4cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_5fdc13ad36c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6057ec50573d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_60194ec4d3c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_606984a5a1422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_600bf65ca6678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fca26bbb0c6e.pdfIn PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/d26bb01d.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/gazofusofogasisib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_604de90d019b6.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/2159f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5fe90c8071e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fe6a2528fe22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418973/normal_5fe1aa0b854c1.pdfIn PDF document text
    • https://medijomozu.weebly.com/uploads/1/3/0/7/130775841/2413562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fe16222928d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd2892967ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601eab786103a.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 5624 bytes
SHA-256: b008d6fa1152d126a792ef284cb20056bcfc811c2cec9a0b9fca0367dad6da92
font_01_sfnt_off000116ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 11200 bytes
SHA-256: ed0b1248de89a5d2da52dfe3f2246f414ea6da6d45a491d067abf9f88eda3834