Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0d40f1541144fc…

MALICIOUS

PDF

91.0 KB Created: 2021-01-16 12:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c553647a440542f2c13d587f2b94cdb2 SHA-1: 71a4647623760c4e5a12cbb6e6891807dadc2569 SHA-256: fd0d40f1541144fc6ff82bd0899435861f2c9dc3993439ce11461a291c85ad37
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to redirectors and link farms designed to host phishing content. The document body, though partially obfuscated, suggests a lure related to an "ICS after action report form" to trick users into clicking malicious links. The presence of brand impersonation and the high ML classifier score strongly indicate a credential phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/kedariposo-kejuwoz-tasuzorigigakep-dipivovalimumo.pdf.
  • 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://ggtraff.ru/aws?utm_term=ics+after+action+report+form In PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/kedariposo-kejuwoz-tasuzorigigakep-dipivovalimumo.pdfIn PDF document text
    • https://site-1174515.mozfiles.com/files/1174515/dejotuvakunojijej.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/5389738.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/6999fd4c94.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/xafuwuzosar_xamalomepefos_bipaluv.pdfIn PDF document text
    • https://bubunixijasebed.weebly.com/uploads/1/3/1/4/131407035/3043594.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/8be2b38.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/e7ghreX/rexufesodumevaxejipoditez.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/kegovev/itunes_free_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/beta_club_requirements_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/20513868342.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/emt_interim_exam_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/asturias_guitarra_clasica.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/freddie_home_possible_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/tinin.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_off000124d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D3 5064 bytes
SHA-256: dceeeb6907a220e17bc7ac4c4b9cb5be5d33272fc9bff107baf921042287c13c
font_01_sfnt_off000135ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FF 12192 bytes
SHA-256: 089a02176fe528827f247fcd98b1642ab82343b46ea7ddef253c94b3235893f7

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