Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa6cf14b9c1d93f…

MALICIOUS

PDF

76.9 KB Created: 2021-03-21 00:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 44fc6353068958f5b75bcd41de00c16d SHA-1: b08cba8cdfde753a688f1d0e279636ce3c094346 SHA-256: faa6cf14b9c1d93fb4aa4074cd07f708755d6c54b1fe3d22ba4842668dd8eb39
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV and an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru' and a query parameter suggesting a video song lure. The PDF's structure and the presence of multiple disposable hosting links indicate a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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://dugedepap.ru/123?utm_term=abrahaminte+santhathikal+video+song++mp4 PDF link annotation
    • https://cdn.sqhk.co/rorajakura/3xih78o/summer_pockets_reflection_blue_switch.pdfIn PDF document text
    • http://doctora.club/mamiralisin2hww.pdfIn PDF document text
    • http://mebelintera.ru/boll_and_branch_sheets_thread_countomobf.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/how_much_is_a_2016_mazda_cx_5_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/7icgcgi/86369038893.pdfIn PDF document text
    • http://playmarket-online.com/kuzofividofanakamigpdp5u.pdfIn PDF document text
    • http://goromeo.club/la_biblia_catolica_descargar_gratissc1zd.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/jf2Pide/nofizegopani.pdfIn PDF document text
    • http://huseyincanx.com/zalidorewajovapojomi6r98r.pdfIn PDF document text
    • http://begdas.space/rilafakirunelukexijewobizjcbck.pdfIn PDF document text
    • http://academic-club.ru/verizfqc3k.pdfIn PDF document text
    • http://lolabarafusiru.iblogger.org/70988383921.pdfIn PDF document text
    • https://cdn.sqhk.co/xunalafugapa/ggfhert/tunnel_rush_2_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/gWpIPWX/overkill_3_mod_apk_v_1._4_5.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/xakajoziwibi/90207854590.pdfIn PDF document text
    • http://kovudefimure.rf.gd/what_hand_to_hand_combat_does_the_army_use.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_b2210c353be4401cb2826c7614c59f80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubata/kinetic_friction_experiment_lab_report.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_ef1acfabe3614aaf8208285a47afe3fa.pdf?index=trueIn PDF document text
    • https://f33eab34-52c4-4f1b-91c9-7c5ec1255b8f.filesusr.com/ugd/9d0374_1f7c1f6ef86b48b8907970aedc5ec084.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_b5ce66f2bfdc4fb6ae7ae99d91a00284.pdf?index=trueIn PDF document text
    • http://toxuvadamutetix.rf.gd/what_happens_to_maven_in_war_storm.pdfIn PDF document text
    • http://xukosabezapo.rf.gd/26913730579.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_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 5712 bytes
SHA-256: 0448268cae281c02946ddf0c987b14a97a0637c1180ebbdbbe416610461e28a0
font_01_sfnt_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 11716 bytes
SHA-256: be5f3b90cc4b45ee041c38077e0497a0a1e5311c73aaf095f73149fe27810447

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