Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b4bc5f6e7977a6…

MALICIOUS

PDF

94.6 KB Created: 2021-04-02 05:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8371cc9d7f377390f7879b31ff80929b SHA-1: 3bfad42d1b0504a8f14ac7fb7e6d848d9a1f1681 SHA-256: 96b4bc5f6e7977a6c58ad19406b7a4fa7972c005ffecbe443929eedd110876a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/award?keyword=excel+vba+tutorial+pdf+for+beginners PDF link annotation
    • http://lasns.fun/54861705834s5088.pdfIn PDF document text
    • http://skidki-day.store/19322924327tnepl.pdfIn PDF document text
    • http://portkamesto.site/feisty_pets_real_dogp4qtp.pdfIn PDF document text
    • http://idealicait.site/62003464760ceeez.pdfIn PDF document text
    • http://handler-autoscout24.com/how_to_bypass_parking_brake_wire_on_pioneer_avh-2550nexyrygj.pdfIn PDF document text
    • http://debesokad.22web.org/fundamentos_del_budismo_tibetano.pdfIn PDF document text
    • http://erogan-oficial.site/metro_2033_walkthrough_dead_citybe3o6.pdfIn PDF document text
    • http://tryplafond.xyz/que_es_caballo_joverov9ddd.pdfIn PDF document text
    • http://movawugutel.22web.org/tofatotifezob.pdfIn PDF document text
    • http://localdesign.me/56108824853ph99j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pulavokaxe/sokosapalikosebovipize.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_a4b862cc477341e69ff6e53edd03b7e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/vosav.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_09230240f99f485ea2ffd0d1504ea935.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea86c4d8-7497-4d16-afea-bcffefeaab7e/sallys_song_piano_sheet_music_free.pdfIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_a2ffa67f8e3f41d687dda5e55eeb647f.pdf?index=trueIn PDF document text
    • http://roxeruteruda.epizy.com/edible_form_meaning_in_marathi.pdfIn PDF document text
    • http://kelamivajaw.rf.gd/platform_picture_ka_gana_suna_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/pukifiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32d1b55-0967-4348-83e0-421342f070d9/is_blink_charging_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/18532793984.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12552 5428 bytes
SHA-256: cf04211e226e88a85345f36f5468c1832b363a5d45bd55e51f3039f5408f0d78
font_01_sfnt_off000137dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DC 11520 bytes
SHA-256: 3ec9b63949c151bbd501ca2f317641169580f0b11cb8bba6464758009ae0b993
font_02_sfnt_off00015f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F16 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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