Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e3cc32ec16aef4…

MALICIOUS

PDF

81.1 KB Created: 2021-03-24 20:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdc71fd4fc4df3895882f793d7607e8e SHA-1: b0deb655fb571b27384c7a0a4c0b1cf391099c07 SHA-256: 49e3cc32ec16aef4e608723944c49e7a39325d7e883c325d1c2bb06f1ebf1f2f
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=passport+photo+creator+free PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/f9PjbOk/real_bike_racing_2019.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/rawaleti.pdfIn PDF document text
    • http://nicepics.xyz/keripiwinidifidunijemavvwy.pdfIn PDF document text
    • http://freshka.fun/stardew_valley_cjb_cheats_menuk04a5.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/QhjxiaS/71109406716.pdfIn PDF document text
    • http://5-euro.info/kidokagusouu6.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/A7aCxgd/58429239937.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/eiejibt/best_video_player_app_for_iphone_7_plus.pdfIn PDF document text
    • http://cardioactiveitalia.site/ludanitopalutama6kuqn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_67e1dca506464363b7bb8b7754b5bf31.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_install_unofficial_skyrim_special_edition_patch_xbox_one.pdfIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_7e6cff8c213b4998889fc87b71b7b480.pdf?index=trueIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_760c092e935b4b2499655741f35e0079.pdf?index=trueIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_ce29219caeda4851a8e3307d4e6dc192.pdf?index=trueIn PDF document text
    • http://dolojivek.onlinewebshop.net/reported_speech_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf88cea-bda5-4f95-8e38-81f1cf7a7936/diberagopunomuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d89afa-bd3e-45e3-82e1-7335622098b8/bozujozowezekigokapekep.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_e037b37646d046e69dec911dfe344fa2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24edae33-0dc7-43cf-ac7d-436b4eccc4dd/prince_of_thorns_audiobook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6893b61a-177e-4b2e-aac1-0ad6383a664e/hoover_windtunnel_air_steerable_bagless_upright_vacuum_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f281523-893d-45f1-93c3-4b0f9b03d510/how_to_calibrate_relion_blood_pressure_monitor.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_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 5072 bytes
SHA-256: 7a9210f32bf962e4ca198d0c17ea725ab0ba94648c4adafc96cc74a05214cc28
font_01_sfnt_off0001120a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 10924 bytes
SHA-256: 0b79c460afc1e4d7adbeef980be887b430711e2bd0398fcc05d73dd52feeadc1