Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a56e7e79527697…

MALICIOUS

PDF

89.3 KB Created: 2021-04-27 13:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f7d361094c07400aaf859f1b1210621a SHA-1: cf92082a0e191e06cb8dadc2702adcacfe917e1c SHA-256: 99a56e7e795276973e2c3e65568adcd00f55f0955735281bbefbcda23b5550a5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=briggs+%2526+stratton+vanguard+14+hp+v-twin+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491433/normal_604898b937f75.pdfIn PDF document text
    • http://basiditdcf.space/avent_microwave_sterilizer_how_much_waterkunya.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/9622472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5ff930a18dcb0.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/quotes_from_dry_by_neal_shusterman.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/bengali_short_drama_script_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_5fe84c9298147.pdfIn PDF document text
    • https://votaxejasusax.weebly.com/uploads/1/3/0/9/130969278/f0a20b12299a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463812/normal_5fff470a71cb9.pdfIn PDF document text
    • https://nuzalegexokoz.weebly.com/uploads/1/3/0/8/130814177/bawusipo-nirabagatot-rumisajar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fce7b5e07e31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411511/normal_5ff6055436e47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_60074efebf870.pdfIn PDF document text
    • http://raifaisentapp.online/jeroreclrs3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465930/normal_6065375f13783.pdfIn PDF document text
    • http://meetdouche.xyz/what_alice_forgot_synopsissxe65.pdfIn PDF document text
    • http://reliables.ru/lowrance_elite_5x_chirp_youtubezspm3.pdfIn PDF document text
    • http://ilkertr.shop/kiwurifigalodorulowexewucvqwr.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/armature_design.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/c8898c742a7.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/sojaxub/74694550196.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/how_do_you_actively_listen.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/tesaruvosesunugumulufo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/complete_subject_and_complete_predicate_worksheets_with_answers_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/delonghi_toaster_oven_white.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_off00012004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12004 4656 bytes
SHA-256: df6e6b5a0bf9b364c5c3eaa7ea9cdffada5da610a7546e6ccdb29b761747c3b3
font_01_sfnt_off00012fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE9 12088 bytes
SHA-256: 9d9961f6be9c5f19c70c66271f23bb983886473ebf99fed39c7918c618774e8d

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