Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde06d1a3ba966c4…

MALICIOUS

PDF

72.3 KB Created: 2021-01-09 19:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f676c06437430a60c14b143f70a9a424 SHA-1: 098885a362a1f929433b267c09ffcb60cf249d89 SHA-256: cde06d1a3ba966c492108252fb47a972168eb165a7034a2aca8d3d72e5d51be7
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 0.9997

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://trafftec.ru/aws?utm_term=joint+affidavit+format+india PDF link annotation
    • https://bokasaveti.weebly.com/uploads/1/3/4/7/134725866/xuretuzaxefaze-mipikuk.pdfIn PDF document text
    • https://gafabudadu.weebly.com/uploads/1/3/1/3/131384489/874727.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/fajigagif-gokanewafax.pdfIn PDF document text
    • https://sifixibufe.weebly.com/uploads/1/3/4/3/134348909/felex.pdfIn PDF document text
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/domejam-dobez-nidorotam-movosuv.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/terabulewu_zukulikekulo_vasizur.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/jjdREgc/planet_pizza_norwalk_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/h4VLjiH/269102951.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gd1jcI5/bruce_lee_enter_the_game_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/xjjbGid/heroes_alien_force_fight_ultimate_earth_battle_war.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_5feeb99de6e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/jiBihd2/how_to_write_a_basic_literature_review.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/nalifij/discounted_cash_flow_valuation_excel_template.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_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 4892 bytes
SHA-256: e1974ae1fe1449662c6cc0e93fbabd4b46f61fd2e54cd948ffd05cdee21c79dc
font_01_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 10080 bytes
SHA-256: d5b3744572157d3d91c5343cd618e104ad2a7dcc960396742ce5efe0dc4d2528