Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad2c2d101dd3296…

MALICIOUS

PDF

74.5 KB Created: 2021-03-12 07:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8420eace9c364a229479c3402fb2df8f SHA-1: 072454cd8ef2b7510bb993e934fed942daa57b97 SHA-256: 6ad2c2d101dd32965e62fd84e3f151217dba3ca557c9c2b3b0e513baa7d7467e
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with the primary one being `https://seumenha.ru/strik?utm_term=how+to+clean+out+whirlpool+dishwasher+drain`. This URL, combined with the heuristic `PDF_SEO_DISPOSABLE_LINK_FARM`, suggests a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=how+to+clean+out+whirlpool+dishwasher+drain PDF link annotation
    • https://cdn.sqhk.co/zasokolof/PdZwChj/ratutafizo.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/I7jijb1/toca_pet_doctor_apk_indir.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/4a91ca023d.pdfIn PDF document text
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/jixesa.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/html5_and_css3_tags.pdfIn PDF document text
    • https://cdn.sqhk.co/fejukomus/hNeBa7A/singing_christmas_tree_sarasota_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/MSjb1oy/mitob.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/4331969.pdfIn PDF document text
    • https://dotozirijekuzo.weebly.com/uploads/1/3/4/3/134315872/sugovulajepu.pdfIn PDF document text
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/420b7c02bf3a32.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/arduino_duemilanove_datasheet.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/kisofizazug.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/67680999140.pdfIn PDF document text
    • http://wefufivubulal.medianewsonline.com/alto_shaam_767_sk_iii.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/pnjfbYb/chikki_bar_machine.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/bojagujupig.pdfIn PDF document text
    • http://degimogug.mypressonline.com/96927990487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobebol.onlinewebshop.net/rilerusuwojaw.pdfIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/behavior_modification_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6329d67-5708-4937-8b9d-c79830671c71/57236013005.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/73395502359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7870b1d3-37ee-42da-bb1e-fbb1a22a9421/buzz_lightyear_remote_control_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2c0d7f-0f18-4fde-8819-284a2742e84a/journey_to_the_centre_of_the_earth_book_short_summary.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_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 5212 bytes
SHA-256: fbc62364f62221641e37e93fc943b88b0d8e4b61f9c0ae1d2e0eaa52ab8c4761
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10416 bytes
SHA-256: 52897742a3e4e7436fa9c1f0d1363d70480626949679fed719fe761a8daae1cc

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