Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34bfda464db2e60…

MALICIOUS

PDF

75.6 KB Created: 2021-04-08 19:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9fd179e28840d3b313b9ec7743fdfc36 SHA-1: 229706a72bd7adad78934698cd7f8b3f928dbfcf SHA-256: f34bfda464db2e609c1823014284e09c7547b06d9dad5165f6bdc1e0d04ae2ec
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, with one prominent URL suggesting a lure related to a product review. The PDF structure and embedded links point towards a phishing or redirection scheme designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=delonghi+2400w+radia+s+column+heater+review PDF link annotation
    • http://fojukivijivik.medianewsonline.com/lugabewudefosa.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/loxinumulutiwadupade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478146/normal_5ffa35759e0c2.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/58080336050.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/btbc_book_ka_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_60263373d3eb7.pdfIn PDF document text
    • http://kaxitijidopu.iblogger.org/emotional_labor_women.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_602a053a0d5eb.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/gemini_security_system_door_chime.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/ccnp_route_download.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/ibhiZhh/wumodalenofajisefonaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481291/normal_6052f461eb77d.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/adeste_fideles_spartito_organo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5fe3b95358755.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/dVVijgc/na_meeting_guide_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejarajavamoge.epizy.com/font_berlin_sans_fb_normal.pdfIn PDF document text
    • http://nupawibufa.epizy.com/pica_trastorno_alimentario.pdfIn PDF document text
    • http://wuxininozikup.rf.gd/xugekajewenabenosuj.pdfIn PDF document text
    • http://rukateridexak.rf.gd/best_resistance_band_exercises_youtube.pdfIn PDF document text
    • http://xixitokap.rf.gd/27795665787.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/dry_adiabatic_lapse_rate.pdfIn PDF document text
    • http://komoridetunitiw.epizy.com/environmental_archaeology_principles_and_methods.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_off0000e476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 5868 bytes
SHA-256: 277d8e78688fd7625dadbdaf3d8cf631f9883ad838f9e9db17f7cff97ff71c99
font_01_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 11352 bytes
SHA-256: cc286fa40855cac8b7e2cd9796065c5a930034dee7d748beb48d174d42aaadaf

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