Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dcbd16378d7ff9…

MALICIOUS

PDF

74.2 KB Created: 2021-05-01 16:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74c8d304b894729cf6f3fa87d2b45ab4 SHA-1: bd24d107f37b5c457eeb0467d0b12086ed61745f SHA-256: 67dcbd16378d7ff95522ea0bddee9f7b30243de8e5b9b1e663d09c5c356e8aaf
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.8872

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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/strik?utm_term=can+i+use+global+forever+stamps+for+domestic+mail PDF link annotation
    • https://rupuxiziwaxez.weebly.com/uploads/1/3/4/7/134765543/29516b833c2.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/3a43309ea.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuzijix/cYieWrU/origami_plants_and_flowers.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hgAdQhc/sea_jurassic_craft_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/M9YLjjf/kofir.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/1ieRpgh/14309164055.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/gixawetopoli/23349743857.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_ec8c741b3ab24ed3b317ce4aff129a1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdea5a33-21fc-4b0f-acb0-7b8a45250efd/49428645242.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_fb1dc482b3b749ea9f10fd453a32cb40.pdf?index=trueIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_e2c0c5a8075c4d0c905aab11f79c1e06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/will_a_steamer_work_on_painted_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c2775c-26ac-438d-a7c2-11cf4b2e0122/how_to_use_mendeley_referencing.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/sonolowisuxavunibeti.pdfIn PDF document text
    • https://04650017-3ca5-4b28-9d9b-11da2816551d.filesusr.com/ugd/aa03de_9fcfac15eaf34fef9c0ecbd3ff3379d1.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_73d7176e970945c3a6840c2a1e7024db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/adjectives_and_their_meanings.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_964813d6df7d41f1a584428aa7404eec.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_e51d287fd6894313808a3ed37521c87a.pdf?index=trueIn 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_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 5580 bytes
SHA-256: 717fbf4bb6cff0b5b8d849063414bbd4ab9e2bc423c9945dd884b06a5825bfd2
font_01_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 12136 bytes
SHA-256: 0981264e86e67066c9d16083d59efa4790650301c9dd3d1d3ca336a22105dd48

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