Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86a644f21aec47e…

MALICIOUS

PDF

63.7 KB Created: 2021-02-13 05:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 421d91c242986f52413ba906addbab83 SHA-1: 5ff88f8dd9320f010b39e53facc4c7ece68cf843 SHA-256: e86a644f21aec47ed1e90f33298f55e5db1d0be4e7c03a7e28058da8990f5efe
156 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 0.9998

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 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.
  • 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/wix?keyword=just+wireless+fm+transmitter+instructions PDF link annotation
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/575af5b0bc.pdfIn PDF document text
    • http://palorobumuwew.iblogger.org/34024899616.pdfIn PDF document text
    • https://migofaxukov.weebly.com/uploads/1/3/5/3/135394112/62ab96ee5.pdfIn PDF document text
    • https://ladupizisegi.weebly.com/uploads/1/3/1/3/131380895/bopelevisuvoxewizevo.pdfIn PDF document text
    • https://tekagilodepini.weebly.com/uploads/1/3/0/8/130813992/duwefumem.pdfIn PDF document text
    • https://zovejesuvenej.weebly.com/uploads/1/3/1/4/131438366/vibubivagibogenex.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/37408436.pdfIn PDF document text
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/cf9108.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/Hzogdjd/army_jeep_parts_bristol.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/4432958.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/gfpFjh0/bears_packers_schedule_2020.pdfIn PDF document text
    • https://nemoderi.weebly.com/uploads/1/3/2/3/132302766/mefulolulosig_xagazesiwi.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/geraromu/4037758471.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/wijoguwefutasudovideje.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/taylor_biocentric_egalitarianism.pdfIn PDF document text
    • http://fewasav.rf.gd/55838906074.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/fibozasufivulabidevazo.pdfIn PDF document text
    • http://vanomuwoz.epizy.com/atreus_armor_guide.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_off0000bd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD00 5108 bytes
SHA-256: f81866d0710451ac8736878e52009d75d45c2dd739482c338a0a6a4d9d1365ca
font_01_sfnt_off0000ce54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE54 10272 bytes
SHA-256: 9e8794e3eba89ef09e4806d3ad87fe522728fe00bfb0e9dfab8ba85b9094770c

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