Malicious PDF — malware analysis report

Static analysis result for SHA-256 12641c884464f566…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 16:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bacfe8fd3fa199aed2c600705fab3b14 SHA-1: 1a98630c6efba9ea6ebdf563677f5885837f7d4a SHA-256: 12641c884464f566b1f0427714e935898ff0ac620c5bea23fbad4de376b9bca4
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 0.9997

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://mezovuduw.ru/wix?keyword=super+dancer+chapter+3+winner+name PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5fe70f7dc4dad.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/ijgLggy/construction_agreement_format_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_5fd0ff8b6819a.pdfIn PDF document text
    • https://xanojamazifedim.weebly.com/uploads/1/3/5/3/135323589/lolumipi-naliromurexe-zegipow-rafijepomave.pdfIn PDF document text
    • http://tobazoduto.22web.org/switchmode_rf_power_amplifiers.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/hjsXjhd/23483899704.pdfIn PDF document text
    • https://lumabejisojexu.weebly.com/uploads/1/3/1/4/131455378/96624756e7a2c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_601cf924e37ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_601756e37fbb2.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/WoSigih/dogidaxobitulopekaxiwo.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/dbc6f85c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_60403567ba663.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/jupaxafafuruz.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/9sKphcp/79998812674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_60311feda2e68.pdfIn PDF document text
    • https://botamelojobowi.weebly.com/uploads/1/3/5/3/135344227/6400467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_6049967001ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_600dc4b03a5ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jukatuvofijeriw.rf.gd/divine_mercy_novena_2020_day_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a4cb82-36eb-434a-98fb-fe31344bfe5c/juboxamonasakebox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66df64ea-73e4-40f2-befe-66f0dfa13bbe/how_to_write_an_explanatory_essay_ppt.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_off000101a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A0 5460 bytes
SHA-256: cfdff5cebbd583a5f3d3588f8cabc68990a91b319b351f93338a16965ca594a4
font_01_sfnt_off0001141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 10976 bytes
SHA-256: a84db27f3263ebca3777ada541fe0b661da3c0efe95f8a71a8e42f586349573f

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