Malicious PDF — malware analysis report

Static analysis result for SHA-256 a986531461f9fcf5…

MALICIOUS

PDF

93.5 KB Created: 2021-03-15 19:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f6bc078fe708444724c0ddfb3bb8f249 SHA-1: edead63adc1c1da02d4991ce2341b34e90b5484f SHA-256: a986531461f9fcf5a457a33e6af0e1f7df7907a9b0e4a869d13a2164db6227d1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains and hosted on services like weebly.com and sqhk.co, suggesting a link farm or SEO abuse tactic. The embedded URL `https://soxebez.ru/strik?utm_term=how+to+replace+a+carburetor+on+a+tecumseh+engine` is likely part of this distribution network, potentially leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+to+replace+a+carburetor+on+a+tecumseh+engine PDF link annotation
    • http://xruhdfo.site/In PDF document text
    • https://cdn.sqhk.co/bipobulif/XfFcjge/rimexemulorek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6025e1e15cf6f.pdfIn PDF document text
    • http://blancer.xyz/bojoduq13v7.pdfIn PDF document text
    • https://paxuweveli.weebly.com/uploads/1/3/5/3/135320709/xutok.pdfIn PDF document text
    • https://cdn.sqhk.co/gipakegabav/1gdhGwl/def_of_obsolete_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_604e93911057a.pdfIn PDF document text
    • http://brumbum3.xyz/trip_to_bhangarh_movie_songo0i28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370307/normal_5ff25dd74b62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_600d50b008242.pdfIn PDF document text
    • https://zibozofos.weebly.com/uploads/1/3/4/8/134896422/984ba62.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/e3f638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5fc90d8e589d6.pdfIn PDF document text
    • http://detonicufficiale.website/homestay_application_ielts_listening_answersqz6ev.pdfIn PDF document text
    • http://clubstore.pro/1883175356258c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_603c7b6548e88.pdfIn PDF document text
    • http://xitnet.fun/patch_for_rb_world_2_aimbot_downloadbjrle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_600db9318512d.pdfIn PDF document text
    • http://thecabinets.xyz/39567724816jnnql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ffaae049ff7f.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_off00013008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13008 5540 bytes
SHA-256: 985f485b055f422da8ffec9cd2236f1c3aa3c961e9902f05a5ba59feaf447157
font_01_sfnt_off000142be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BE 11008 bytes
SHA-256: 069914302b93a5aafc19c4687f040fac2edcb37bb8156efa3e409f2ee611c508

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