Malicious PDF — malware analysis report

Static analysis result for SHA-256 7339e1e113960129…

MALICIOUS

PDF

70.6 KB Created: 2021-03-21 08:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7cf6cd7f16d48d6c19c2b490563f3bf1 SHA-1: 95d81cbad05e3b05dea0575c10bf5f8f4138aa3f SHA-256: 7339e1e1139601297ec803963cacd5ae800334233867ed2cfc0f2716e3740114
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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=zmodo+camera+not+recording PDF link annotation
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/4790171.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/5358149ce20e.pdfIn PDF document text
    • https://sovurides.weebly.com/uploads/1/3/5/3/135349611/ratikeximod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_604e31dbcf710.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/motuka.pdfIn PDF document text
    • https://lujiwosibe.weebly.com/uploads/1/3/4/0/134040634/e1e6b5ddf57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_5feaf4f7891dc.pdfIn PDF document text
    • http://pozidekozavam.iblogger.org/wanegafal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_99be4ef58cea429e9f0ac9b6eb8838bb.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_1206049141914e6084762639a2d33ba4.pdf?index=trueIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_4b6c390c99e54037a53f78cc59cdc3c4.pdf?index=trueIn PDF document text
    • http://gijuvaginitawaz.epizy.com/51934587926.pdfIn PDF document text
    • http://rupokabimizoju.rf.gd/40977085217.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_b1ce8db0e09343f28f22f0f31193a771.pdf?index=trueIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/3503198121.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_28d66ac6506e448486260627e0ac706b.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 5008 bytes
SHA-256: dbfa8660fa3bf5ff11b68223e27d6ff28fb2b763ea4b6a0138b1fdf938abd905
font_01_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 11296 bytes
SHA-256: 06e0b9fa4c35e8cfdb35acf52cfe69427fcb0994c711d7ee4a651be932db198b

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