Malicious PDF — malware analysis report

Static analysis result for SHA-256 7030a7fbb3936db8…

MALICIOUS

PDF

74.1 KB Created: 2021-05-15 11:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c866c22e2707cc2c4a48afb0b92a4f59 SHA-1: 708dbdf091feff266b6e50305084f0250ff4f1b6 SHA-256: 7030a7fbb3936db8e1ba446b4ff69cfe210dbe81e4fd47b0dc87fa112d0674b7
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 ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered as a spearphishing attachment, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=motorola+apx+7000+vhf+antenna PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371786/normal_6046102fd0b0b.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/1539867.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/borotik-wefosa.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/jifos.pdfIn PDF document text
    • http://nowefewafugaki.iblogger.org/baptism_of_fire_lds.pdfIn PDF document text
    • https://kofutisidizeb.weebly.com/uploads/1/3/1/4/131437743/33267c4cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_602e83ff2621d.pdfIn PDF document text
    • http://rufapemosisubev.22web.org/how_much_dog_license_cost.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/3338255.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimemotom.rf.gd/best_exercise_for_back_pain.pdfIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_69c6ab511e6e424490cade7089f00427.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a241fc2-7659-4a42-8578-2f6d4d8b0afc/what_is_my_philosophy_of_leadership.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_e7d8e57d15ec4f37a8d9b3652d89b026.pdf?index=trueIn PDF document text
    • http://wodatefajudofow.epizy.com/sovozabetet.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/gikorokije.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0e67f42edc8749898ac3e435efc858ae.pdf?index=trueIn PDF document text
    • http://rolezudebozi.rf.gd/participatory_action_research_manual.pdfIn PDF document text
    • http://tesaminovosino.epizy.com/fazoxibomibebimefujezi.pdfIn PDF document text
    • http://gukuwet.epizy.com/7857134859.pdfIn PDF document text
    • http://gosonuvubunevo.epizy.com/17890109499.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_b341ca794de54021a112e754841735cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fd898e-a78f-49e2-98ac-05998f6a1b6b/53702914015.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_off0000e4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A2 5168 bytes
SHA-256: 99bad66489d05667389f80b79eaaa0ba78d4b8ed1d12c16c2ff49d011a67f4e5
font_01_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 10712 bytes
SHA-256: e3532f4c2111c3ee23aeb69d352e4046994bd51530757fa1f6c0225af8726375