Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9178f86c6f28b1b…

MALICIOUS

PDF

79.5 KB Created: 2021-05-30 19:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 657ac935bf9fa7a2cf48bd214361f908 SHA-1: 360e4d1b36833b056820b8574f762bb71639892c SHA-256: d9178f86c6f28b1b514e1cba3d183acd80bb52c5617943a59a4f583a124dbdbd
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL like 'https://pelibifir.ru/strik?utm_term=2020+gmc+sierra+1500+sle+owners+manual' indicates a lure to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pelibifir.ru/strik?utm_term=2020+gmc+sierra+1500+sle+owners+manual PDF link annotation
    • https://duxizesojisuvab.weebly.com/uploads/1/3/5/3/135327590/8852419.pdfIn PDF document text
    • https://guxevelanitab.weebly.com/uploads/1/3/4/7/134769418/7902301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5feb57cc94217.pdfIn PDF document text
    • https://dikodaselafilug.weebly.com/uploads/1/3/4/1/134108642/nogojefazo_rorozaloramo.pdfIn PDF document text
    • https://melusibisi.weebly.com/uploads/1/3/4/5/134595399/xodapamevig_femamabomad_gepasi_vufoxividaso.pdfIn PDF document text
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/38c02b03c791d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fe2b342937b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fda90437df13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_60058610b14a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470692/normal_6065d36bf0b6a.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/futepi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500440/normal_5ff304ab24dc2.pdfIn PDF document text
    • https://mufiwejugoj.weebly.com/uploads/1/3/4/3/134340856/3745853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fedab956ed01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_603f7e9ca8109.pdfIn PDF document text
    • https://zasipirowi.weebly.com/uploads/1/3/4/2/134266189/3305892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_604a25c07339d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4388173/normal_60b1f9fb79a23.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/2502885.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/juliminikitabo_vakesogalomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_60303a5ee8e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_60629b6c7da41.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/1e685805-dbe8-45d1-900e-2e852d1ce766/82852774453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf44b8d2-b407-49f7-ab05-d2cffa8c6a51/hitron_4582_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609576e5-0eec-4513-837e-f115ba539152/baby_tell_your_pregnant_by_hand_pulse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728516b6-d25a-4640-8455-7494a12cf871/38950280498.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_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 5564 bytes
SHA-256: 281e0c11a58304ed5d30b02cbb5f9b71f3851198618c3b2ab00e7beaad27dc94
font_01_sfnt_off00010b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 10808 bytes
SHA-256: 3344cbd164aceb4c271c5799cee075fc93bfba41eb4197c9937c38f4d1ec983f

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