Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bab42471322002b…

MALICIOUS

PDF

85.0 KB Created: 2021-01-29 02:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04cb62ed6860afbc88bd2becd7c60891 SHA-1: 015849661a98bae3cc2261a0341ade71cadd8533 SHA-256: 2bab42471322002b197d37bd62243aff334556e87a49d4fb6804119eeaf92813
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing/trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jacksth.ru/wb?keyword=siren%20head%20call%20simulator%20juego PDF link annotation
    • https://cdn.sqhk.co/lijipatalenu/ghjgeBH/call_from_cartoon_cat_games_unblocked.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/5e08337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463275/normal_5ff85d2381ebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_600cc377c4a28.pdfIn PDF document text
    • https://cdn.sqhk.co/jorubili/jgDxphe/11630618153.pdfIn PDF document text
    • http://salearea.pro/modern_zombie_shooter_dead_target_offlinegtrqu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_601142f4f37a7.pdfIn PDF document text
    • https://fakibugopozap.weebly.com/uploads/1/3/2/7/132712115/fijalefikavixar.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/pesiru-solujupejol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_5fde7b6cc14ed.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/uWigwia/51398800401.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/7754097.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/jbie4UG/kupepenuluvebarevojumudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fdaec9fd696e.pdfIn PDF document text
    • http://alex-travel.moscow/49251454022beyvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/dead_by_daylight_survivor_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/fnma_guidelines_pension_income.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/drew_brees_injury_report.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5532 bytes
SHA-256: e2780d037e9d1a372b01db31cdbe7b8eca95d32b77b59782aa229036e9f0e443
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 3532 bytes
SHA-256: f2eb62a621b8bf5a51127efb9b6757706164c28f81e37ed947488b4213d2a1c4
font_02_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 12184 bytes
SHA-256: a65c41f6efbcb8cb2c6e0b66cc396c9a90ba2241489a6ed9592c5b2ba301b4bf
font_03_sfnt_off000130a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A6 16168 bytes
SHA-256: dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d

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