Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e96c04625090470…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 13:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f8ea363ae1cb73cc67f1d8b1576b883 SHA-1: 7ea8c72d101a21e8ce4f72f95baeadb98535479f SHA-256: 6e96c04625090470e8f5059f7c1943022b6c3b71258a80ad2fba1bfb6c96d604
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious attempt to redirect users. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a malicious intent, likely for phishing or malware delivery.

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://zajinet.ru/strik?utm_term=samsung+blu+ray+player+ir+sensor+location PDF link annotation
    • http://momsmall.space/anjaam_movie_3gp_video_song6n3vj.pdfIn PDF document text
    • http://raicen.com/51085169132bk7d4.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/zulur.pdfIn PDF document text
    • http://nyvelsets.online/where_to_sell_used_mens_clothes_near_me2d5q7.pdfIn PDF document text
    • http://game-pro.xyz/periodic_trends_worksheet_answersa6pvu.pdfIn PDF document text
    • http://zzzmmmmejjj.space/a_level_maths_vectors_questions_and_answersnip95.pdfIn PDF document text
    • http://medyayazilimtr.com/47376569725gmiea.pdfIn PDF document text
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/kaxawanugigugadivow.pdfIn PDF document text
    • http://xrootunited.com/bunabukexerzpza9.pdfIn PDF document text
    • https://pumazamobu.weebly.com/uploads/1/3/0/8/130874095/ac15a368a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db23b67b-3760-4cf1-9560-c6f44cbee600/essential_words_for_the_toefl_anki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7303f9d1-4aa0-4ac2-bac1-bfb660ef2b67/apft_push_up_sit_up_standards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6f4b67-fb84-4d40-8808-67d735ce5bed/sutiwegowegemivofamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa2db61-b533-4488-8077-9af8b103f8e5/pemelexuwizitazuzitavug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b4bdb8-81ce-4e28-8d69-5627f5ffd187/rikuxufivonokojawunozoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affd2314-bb1f-469b-8c5a-b7d0bcfcb708/wexusedofuzekeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2188bd47-b287-4202-91dd-e3ba37ad7267/the_monk_who_sold_his_ferrari.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_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 5600 bytes
SHA-256: 9233bd61c14215acfcb0543b445645d1a3dd0dce89d3fb1d5caf2dcf99f23a5c
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 10604 bytes
SHA-256: 021a0ab2f13ac924a68f869da28942115ad1b2aad586733b60033d7652a93d9a

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