Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6741ca1d2ded6b3…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 16:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4ecdc07dc6557f262fd6e8d98a52e033 SHA-1: 392fa4d358a5c05edf840615639257044abf75d5 SHA-256: a6741ca1d2ded6b32951a28802c48425e8fa18136fc162e7c4ed3370ac654259
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing or link-farming campaign. It contains numerous embedded URLs, many pointing to disposable domains, disguised under a seemingly innocuous document title. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=simplicity+pioneer+sewing+machine+manual PDF link annotation
    • https://cdn.sqhk.co/juputufom/hfjdEhd/super_brawl_universe_all_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/dVIOhaB/homeschooling_during_coronavirus_memes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_600a1fd8022d8.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/coil_ignition_system.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/ibjjjgD/best_video_format_for_social_media.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_5feb07e51ad41.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/80544648966.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/wupusapadasovafabajagek.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/b7a0775dc655.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/81368883398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_600486669bbdf.pdfIn PDF document text
    • https://mujiwirum.weebly.com/uploads/1/3/4/6/134613500/1635910.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/kemulunif.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/frontend_and_backend_web_development.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/bissell_deep_clean_professional_pet_carpet_cleaner_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/moxuzafupif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca8a059-53cd-41d9-aab0-15cb4db26808/5210443187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5544ba6-9e3f-44f7-a046-78e24c6df348/bobbi_brown_makeup_artist_daughter_in_law.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/information_security_policy_template_iso_27001.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/theoretical_framework_about_absenteeism_in_school.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_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 5644 bytes
SHA-256: 04fbc03a35d072ee94bdcb9faa4b6f1565a1350aa8876e9c67c5f4614aa7801b
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10536 bytes
SHA-256: dbc3798404bb83b83d63e67cc32e2e7691bcc0a851f99ff78905c552b61e99db

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