Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b619811c8287891…

MALICIOUS

PDF

85.1 KB Created: 2021-04-16 17:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6aa5da38be8e0e4b3c5e92600cb1d023 SHA-1: 50186fb4a7f0244687d955e42e112ca119ba831e SHA-256: 8b619811c8287891bd08b9b805655ce904fecdc531739e8260bae0c394571e12
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to legal qualifications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=what+qualifications+you+need+to+be+a+lawyer PDF link annotation
    • http://potuxoposutu.medianewsonline.com/54144303743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_6058b52f0dd41.pdfIn PDF document text
    • http://palupalukagu.mygamesonline.org/the_buddha_geoff_and_me.pdfIn PDF document text
    • http://topcabinets.xyz/cydia_ipad_freej6fic.pdfIn PDF document text
    • http://italdom.fun/types_of_quantitative_research_methods_ppts8n52.pdfIn PDF document text
    • http://tryne.xyz/55283787207o6emw.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/vivaxofodubavosawudasatev.pdfIn PDF document text
    • http://diduziwiti.22web.org/baahubali_2_video_songs_telugu_mp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_605bb1d379a00.pdfIn PDF document text
    • http://vekvelo.ru/33929265087oayfj.pdfIn PDF document text
    • http://cleanup-sale.site/rheem_22v40f1_pilot_assemblyacf33.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://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_debb89d7750647f9a1dec5d49f69ec0c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa6d2a9-b5c0-446c-8a8b-af801b3d9ece/2546372149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1c3a2a-dc08-4023-81bc-4e3cfd4f37b0/32359951248.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_58eee1289ede4e2dbf22df15f7f11200.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/170864a3-892e-462e-9cc0-8bdfc4102984/81113521098.pdfIn PDF document text
    • http://tarisuwagawata.epizy.com/blockchain_technology_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc69d77-1704-4137-9940-ddb7814deb70/42110352886.pdfIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_c80a5124b74843728f1bbc0c5081f28a.pdf?index=trueIn PDF document text
    • http://luxixeg.epizy.com/moedor_de_cafe_cadence_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 5464 bytes
SHA-256: 219ba9c1ea724fd13136f780bdf15a4d5c078c232a39682e45277e1e3b4c8e7c
font_01_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 11048 bytes
SHA-256: abe6d1864df830b003f97dbc7cf3850517c0347b35cb41c00bc101aa6b09a1a8
font_02_sfnt_off000138fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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