Malicious PDF — malware analysis report

Static analysis result for SHA-256 d477267c0a092d26…

MALICIOUS

PDF

79.1 KB Created: 2021-02-26 04:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1a5aa882206ff153121dcaa6570f534c SHA-1: 6c546dd03699df15745924d73393f3e6fe3f15a1 SHA-256: d477267c0a092d2619391538a2a8928e7287e0bd316e8e47203d994a626a6800
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, suggesting a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=bmw+e60+workshop+manual+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcedd4e4bfa8.pdfIn PDF document text
    • https://zuretajobujab.weebly.com/uploads/1/3/1/4/131483148/715aba5a7a0d110.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/zezezeru-molimirobobe.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/87805e0a5b9.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/crossing_field_piano_easy_sheet_music.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/e4fc798fc0ab9c.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/165827.pdfIn PDF document text
    • http://fubawubu.22web.org/77869092038.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/vawam_gepazodo_xodepivif_jexete.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/zususowe.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/terepuk-pakusarugi-wubiditeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5fd2da3e0144e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff7d4c5c214c.pdfIn PDF document text
    • http://godumos.22web.org/94681491689.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/9271230.pdfIn PDF document text
    • https://xavozunop.weebly.com/uploads/1/3/4/3/134305705/tilege-keronegivuzi-zepirelim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://magivaxinel.rf.gd/25483079698.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/checking_system_information.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/laninapuketotodogases.pdfIn PDF document text
    • http://xawabaxazulaga.epizy.com/javascript_template_literal_html.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/happy_birthday_piano_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5360 bytes
SHA-256: 1d64e07a81c698b4f9927b98630e28f59b22e9c04d066abac0d0334ceb8f19f5
font_01_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 10440 bytes
SHA-256: 7a0baeaf02e0c70c4b4c4ea481b9eea2186c9a9e7e6200d87414030af6bcab84
font_02_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f