Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f2841b5c6ef882…

MALICIOUS

PDF

75.4 KB Created: 2021-03-25 07:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3a5b58e9b1369dfcaa8b56eb5bd73e36 SHA-1: a96f48a1229911681e87c55901ee3e56d72124b8 SHA-256: 38f2841b5c6ef882ece63b0eec7b74e33f2ff4f3b2fe619ef5f72a3ee831b1f2
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and link farms, indicating a phishing or content-luring scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://botokaw.ru/award?keyword=low+back+pain+exercises+arthritis+uk+pdf PDF link annotation
    • http://bristol-yalta.run/dimolixubenarozenoxilroo26.pdfIn PDF document text
    • http://ferobozimu.iblogger.org/bajaj_allianz_life_insurance_death_claim_form.pdfIn PDF document text
    • http://storeplus.pro/jufeninekafufixeduforutuixg.pdfIn PDF document text
    • http://kukushpa.fun/how_to_make_your_teeth_look_whiter_on_tiktok26p96.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/jiNWiix/11672402260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fe5bc57bf0e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5ff9d064e801e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_600fdae66fd46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5fec96c7de3f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5ff062b6c169d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_602da00ff2655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_602ab76622b3a.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/eFhlhhA/80829940478.pdfIn PDF document text
    • http://flipping-car.online/ao_smith_hybrid_water_heater_anode_rod_replacementr9fv1.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/baxukufi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_ee6bb1503f27401fb8003d6476bdba79.pdf?index=trueIn PDF document text
    • http://rubabup.epizy.com/lafepoxusatulumitiv.pdfIn PDF document text
    • http://fategag.rf.gd/sociological_imagination_chapter_1.pdfIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_0ecc58d399834a318bcf8297c73bb185.pdf?index=trueIn 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_off0000e8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 5516 bytes
SHA-256: 1871091ec2f925f4d9c2d58379f3e6f45e4a898e95a246f6dad44f1b66e9748e
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 10528 bytes
SHA-256: e207ed10c311d6a0facd37a415a080cb5c7a6fc24258ee2bc2333a5060d99b7e

Open this report in the interactive analyzer, or submit your own file for analysis.