Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5268bef7975f01…

MALICIOUS

PDF

75.4 KB Created: 2021-02-25 16:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3e3a7b9ad6752e66d175694cb16a1e22 SHA-1: eee8c9a530b252b4c2a57fa79fc6b2f83ab19c00 SHA-256: fc5268bef7975f01e45baaf11fcf654783699f12fc97c25e7141fa8f185e9276
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=5+minute+crafts+chocolate+bottle PDF link annotation
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/niwinumipi.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/ketuvamizegaja_nelutazowejoz_dazivul_vajamalur.pdfIn PDF document text
    • http://guwelureg.22web.org/aws_kubernetes_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/fivuwunar/ijid8gf/mobile_legends_bang_bang_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/ifgigiv/genefitajevokugasagipesiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kukojuvata/IheFigd/geometry_dash_fernanfloo_1_juego.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/jijc1LD/ice_hockey_news_europe.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/veseke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajalapivibobi.epizy.com/other_words_for_guided.pdfIn PDF document text
    • http://loxazugexola.epizy.com/brackets_software_for_pc_free.pdfIn PDF document text
    • http://surifuj.rf.gd/joronasabaludovukujej.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/lekepexanenigikabapuzedir.pdfIn PDF document text
    • http://wugadavax.epizy.com/xutevojoniwinikitukafal.pdfIn PDF document text
    • http://zisubaripuxiba.epizy.com/ultrasound-_guided_breast_biopsy_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/negafuvakewexawojitilewu.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/what_bible_said_about_reincarnation.pdfIn PDF document text
    • http://mewexudidis.epizy.com/64404482581.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/does_netflix_have_little_shop_of_horrors.pdfIn PDF document text
    • http://lepetape.epizy.com/how_to_replace_battery_htc_one_m8.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_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5288 bytes
SHA-256: 5b8952cc75f79c5216dbd94d909fdfcdfa0209473ab73be1ff531c0da031ec20
font_01_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 10436 bytes
SHA-256: d09619911946908506baec62bcac30dd7726eef7d19d35340725c7030325e734

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