Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e170d7e96ff1e4d…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 09:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec241fea6c41fc5e8cb0e5ba1aa2022b SHA-1: 76cc80fefedb1b7b3fa657ff3073e31c23e82e73 SHA-256: 6e170d7e96ff1e4d0348dcd779d33fe7a3b7bf4f745379bb698b0f45e1686561
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely leading to a second-stage download or credential harvesting.

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://baarspo.ru/strik?utm_term=ruger+sr9+vs+sr9c+magazine PDF link annotation
    • https://cdn.sqhk.co/fuvivemu/gphbha4/diroseson.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/gg5vhb5/nearby_friends_app_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/haigcie/xominedixetuduvetoboruv.pdfIn PDF document text
    • http://difexolexakax.22web.org/logo_game_answers_expert_pack_21.pdfIn PDF document text
    • http://banquepopulaire-fr.org/book_folding_templatesyjeqi.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/0VwShfu/89124824870.pdfIn PDF document text
    • http://haifaiv.ru/ludugurabefafomajutalatoxv9jyu.pdfIn PDF document text
    • http://beststudent.space/weriladinasevazabomubaw78tbn.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/iv9ja1U/93928578813.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/tozaduliwubega/solunekupumalanopawozeja.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/refakanef.pdfIn PDF document text
    • http://sasaroguri.rf.gd/byomkesh_gotro_link.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/prentice_hall_geometry_textbook_answers.pdfIn PDF document text
    • http://dusalotiwuje.rf.gd/nys_ela_state_test_2018_answer_key.pdfIn PDF document text
    • http://mafasegu.epizy.com/video_player_app_for_java.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/18203414254.pdfIn PDF document text
    • http://mamotupot.rf.gd/55825550471.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_off0000d915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD915 5360 bytes
SHA-256: 92c6f1eda895640afe452499c8a9831202cc88ac52c107ca13c9dcf56b27e516
font_01_sfnt_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 10976 bytes
SHA-256: 8321af9fbd9e21e21d632936429b53fe9f214f1f6373c16c4029b9ffdea1e5ce

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