Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef271b034a1d9cc…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 04:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fe6b815f9e9d3fa34b742542d669e852 SHA-1: a3f42366014503555613b6a1f174624c3b4279f4 SHA-256: bef271b034a1d9cca1facb2e51d9b8c1e7fa1dc94cd437f60fdf701e069ab3db
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm. The primary URL, 'https://baarspo.ru/strik?utm_term=marine+corps+awards+update+dd214', suggests a phishing or scam attempt related to military awards. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=marine+corps+awards+update+dd214 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5feb8de832fb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5feeba9674bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_600ae470bbd53.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/xiifR6Z/video_editor_free_trim_music_app.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/njjpigO/atlantic_undersea_cable_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5fd03fc23a900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_604bafcee55c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_60313e4059c51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ffe49d633b75.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/gzICixg/synthesia_latest_version_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/ict1ihh/square_footage_paint_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_5ff9589108c56.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://uploads.strikinglycdn.com/files/2d588598-6489-4580-8a25-d73cb4c7b696/yamoto_band_mp3_songs_download.pdfIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_52ed9633ddcc47098deed82323f89078.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaf7d05-9a76-446f-aa19-23b8e8d276df/altered_carbon_season_1_episode_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3775f9-73b3-4bd3-a66e-950edfa1e283/2006_nissan_altima_owners_manual_free.pdfIn PDF document text
    • http://zukeligo.rf.gd/farm_risk_assessment_template_uk.pdfIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_9db1fbd892274ac99a390d9f8108248c.pdf?index=trueIn PDF document text
    • http://tiwojojerat.rf.gd/5918054078.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_15703e9cb13c4f4dbdb56e26e0cba0a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c544e2-92af-4c62-ad35-4b49048c513e/how_to_become_a_millionaire_with_rental_property.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0954c1af-a9a9-478e-9aa4-fdf93ce19b0a/paxituviziki.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_7f4378dc5d1c4414b049d50391b9fb2f.pdf?index=trueIn 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_off0000f6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 5284 bytes
SHA-256: 47f4cd39850cc14c1826b2395a67b33cfd3bc9a068da349c7b7dab8ac7ac999f
font_01_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 11568 bytes
SHA-256: 5770c52e290d2f649841785fcab08c93cf2ee8e57f856aded356a6adb873a664
font_02_sfnt_off0001302d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.