Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067fea070b62ae9…

MALICIOUS

PDF

75.0 KB Created: 2021-06-09 17:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2599e275a7c4d3db023628dc942b97bc SHA-1: 2b688f57e04aeafdf7e0a67c5fba4ac91f05443a SHA-256: 0067fea070b62ae9ddac1415f13a70d04e863cf97a6e98e9d8b1abbd56b0ee6d
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://irlanc.ru/pbw?utm_term=two+sided+printing+exact+positioning+pdf PDF link annotation
    • https://fezadegijowazon.weebly.com/uploads/1/3/4/0/134096780/8c96d11d7.pdfIn PDF document text
    • https://merudaxesu.weebly.com/uploads/1/3/1/3/131383629/jonuminulijogoviroti.pdfIn PDF document text
    • https://sagejajake.weebly.com/uploads/1/3/5/3/135303377/nupipuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6010d011d7334.pdfIn PDF document text
    • https://lugelobixo.weebly.com/uploads/1/3/6/0/136095506/gefitiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_60520c2d0ee6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_605f1b0b21ecc.pdfIn PDF document text
    • https://jalupibu.weebly.com/uploads/1/3/4/5/134520797/ribawipapifu.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/pogoxalu.pdfIn PDF document text
    • https://kuvitoguke.weebly.com/uploads/1/3/0/8/130813837/19ce1b.pdfIn PDF document text
    • https://bofewake.weebly.com/uploads/1/3/4/6/134695903/8393200.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/3110365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5ff12ea18227d.pdfIn PDF document text
    • https://juzugimigiroteg.weebly.com/uploads/1/3/2/3/132302883/womitubemotetizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6031574-d59f-49f4-a9bf-8936ca349ce5/98309402829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ef8179-82a1-4b90-afb7-34dd19b75f1b/77097328969.pdfIn PDF document text
    • http://sukagafamo.pbworks.com/w/file/fetch/144663873/can_a_ceiling_fan_run_without_a_capacitor.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/moteferipilupinuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac70ebe-0c7b-482f-8d1f-f53ddd146295/91573050752.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5400 bytes
SHA-256: e815d0708baef4617a26a794e33510f74ef0c3ee1fd4a665de82307218732452
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 10604 bytes
SHA-256: 2ece090b4deae3b2550c52201a3d096e3dcc7fe488a7f49870aaafe1cea0bc81

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