Malicious PDF — malware analysis report

Static analysis result for SHA-256 059e302e98db118d…

MALICIOUS

PDF

80.0 KB Created: 2021-04-16 04:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 11c9e2110ec0834400db773333075939 SHA-1: 26bc6f37194e10fe1935b8923bb685ce78dbb2a7 SHA-256: 059e302e98db118dbd9ef9eedf06b9913aa365770bf0a85ef3a141ccb87bb655
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The embedded content, though heavily obfuscated, likely serves to disguise the true nature of the document and its links.

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://gimoguvi.ru/strik?utm_term=nikon+35mm+1.8+g+dx+dxomark PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417205/normal_6069d65d234b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_606ac5400b7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469349/normal_606155e381fd6.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/ravevasagor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5ff9047b07e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_6049f44a06639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_605a9174db8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_603d34bc78ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_6037c528cdcdd.pdfIn PDF document text
    • https://vitozosusa.weebly.com/uploads/1/3/4/7/134727909/3314467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_603d47d2b9191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_6005803b62358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_3d23b6983bc040ea96d0ffc62306b9ae.pdf?index=trueIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_b701f32d266a4c8c935c55550187500d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93fc5c6-cbd9-45aa-a0e0-5d96ade72537/msds_sheet_for_clorox_disinfecting_wipes_fresh_scent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f5e5a5-aa60-4fc0-aaf9-6ce39ad7391a/36189207008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee357c8-da34-49d6-9f2e-d4edcdced320/zowodapafesife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e43ec87-c3bd-4881-b067-4a0dd9d13afc/pathfinder_kingmaker_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ded5d5b-20d9-465e-ab92-6d49357e6da0/petting_zoo_farms_near_me.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_909b1a9367864d93b130f46a8834785a.pdf?index=trueIn 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_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 5604 bytes
SHA-256: c4e036c343542a828aef50a6584f151f58936df30ab37a491bf6f7d9da90800a
font_01_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 11928 bytes
SHA-256: d44c2cafc4a04c87345326becdefbe667c4913e26431ec68c42bcaac5ba77bb4