Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5d1fc5db5bbc2e…

MALICIOUS

PDF

93.1 KB Created: 2021-06-09 01:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 46c71d96aa98908362c0977e235e2313 SHA-1: 33dc3f91f686759a7994a07b07b9c883b1442a4d SHA-256: 9b5d1fc5db5bbc2e23e276927730a867157e0681452f618273edab5d8451ac62
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. This is a common technique used to distribute phishing lures or redirect users to sites hosting malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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
  • 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://pixomot.ru/pbw?utm_term=rogue+pvp+guide+classic PDF link annotation
    • https://nimukebobe.weebly.com/uploads/1/3/4/5/134527887/7103801.pdfIn PDF document text
    • https://lufugidot.weebly.com/uploads/1/3/4/8/134848642/7040646.pdfIn PDF document text
    • https://xiwapidijiz.weebly.com/uploads/1/3/4/5/134511693/guzasidor_viregumepex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_604acb3e1d1d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5ff4f035e1222.pdfIn PDF document text
    • https://nevimemiwuje.weebly.com/uploads/1/3/5/3/135332714/mukiponexaz_pojegufikot_pifavukotibe_mutebosego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_605b707b6574a.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/wuserulaxifu_ferosefagina_lurimelewirir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f9f08a-6c35-4ace-8135-6c91d2423f02/debidimazazebusexome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4bc97a-783f-448f-9dbf-b85e015888a9/30750378513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377b74c6-03d2-4ad6-bea6-075f393e88b7/gamuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4e25cd-c5a2-4f99-a196-e70e8d603e33/wuninitufotoxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd86ef88-5e09-4c6f-90d1-7a7b6465c3e7/arduino_uno_atmega328_pin_diagram.pdfIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144418050/10260955514.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144426804/nozefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721de2e2-c31b-4acd-81af-b0b21714306d/the_pact_cody_garbrandt_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea42706-fce7-4636-a261-6dc27197ea1b/formation_constant_kf_table.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144455244/42222668807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee22361-e1a0-4a51-848d-21d08f6d9532/19824130620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27418f25-dd7b-466f-9cbe-d48148a3f386/sijol.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_off00012fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDB 5212 bytes
SHA-256: ad967679ec70ae50c7258b459396c441c87150b77557ef96f0aca39a0c7e697b
font_01_sfnt_off000141c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C1 10968 bytes
SHA-256: 8f9a1d17e4adb86268ee549816811538eedff90bb9b508a3889206844378d78d