Malicious PDF — malware analysis report

Static analysis result for SHA-256 293ba0c414cff066…

MALICIOUS

PDF

75.8 KB Created: 2021-03-31 01:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2632ca3385facc602b019471002b4d32 SHA-1: b8fb98b0537a30b664e42cd6402d62db525cfd42 SHA-256: 293ba0c414cff0667a164017c0ee6c7901d3122ed8b00b1c467a361bc390dcae
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=analyzing+numerical+data+estimating+large+numbers PDF link annotation
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/gazizu.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/b179c5f30.pdfIn PDF document text
    • http://presentinsta.online/topstone_horror_sounds_of_the_night9kei5.pdfIn PDF document text
    • http://lisolu.org/99623160009eqs5g.pdfIn PDF document text
    • http://disetikala.22web.org/john_deere_x320_for_sale_nz.pdfIn PDF document text
    • http://zahlungsservice-ch.site/how_to_use_dish_dvr_remotetksjj.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/983e40538c5082.pdfIn PDF document text
    • http://copyrightprivacy.site/jubazerudumoxijuparudajawlp55s.pdfIn PDF document text
    • http://dazixetenulega.22web.org/basic_knowledge_of_computer_for_competitive_exams.pdfIn PDF document text
    • https://rubopawine.weebly.com/uploads/1/3/1/0/131070645/regexopexiparok.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/3823246.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/6729606.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/6948747.pdfIn PDF document text
    • http://antinomi.design/xudewujiludorow6cb8y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wapupegalul.epizy.com/xiroxaxomotawokakebiz.pdfIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_9e3c1162aca1461f96b23e558ea77474.pdf?index=trueIn PDF document text
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_1938b63380da453e8eb0d16581d2928c.pdf?index=trueIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_608647da225a45aca200d9e5fef8d86f.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_c8abafac720147d9a972b8bcb54bf360.pdf?index=trueIn PDF document text
    • http://faxipobusevive.rf.gd/replacement_parts_for_ge_xl44_gas_range.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_9b74444662dd4a7aa869f40c6c7fe383.pdf?index=trueIn PDF document text
    • http://nakedavip.epizy.com/38348585265.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_a29a108ae1274360976ca77c2a077672.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_416d694ef6ca4a78a1be80daed13090a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 5312 bytes
SHA-256: dda700890b8fe08bfa5aef91ced345c2dd134ae2cd92f7e0247ce473d3af9cba
font_01_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10184 bytes
SHA-256: 2ffe0ea1ec9b0619768e90626cfa021596cd04f8dbf5e6c465575cf3c1aa1a16
font_02_sfnt_off0001129a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361