Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef274bbf2d5be05…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 11:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6e44df6bf9a8e0212fb5c6e85d75cf61 SHA-1: 74b40739cc96eb928379b1ac49915d2d44387169 SHA-256: fef274bbf2d5be0510c79c75e037d6ecf828671209453e86c20bbbade835327c
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable domains and are likely part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate maliciousness, with the primary URL suggesting a phishing or malware distribution lure related to 'b tech cse books pdf download'. No scripts were extracted, but the overall structure and URL distribution are consistent with a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=b+tech+cse+books+pdf+download PDF link annotation
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/jafebizi-kokubibejawovo-tulifow-xunevogagesisas.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/zubaweve.pdfIn PDF document text
    • http://prizyivnik.ru/72592215727u7p5.pdfIn PDF document text
    • http://segwaywheelchair.ru/simekejovakwlsc.pdfIn PDF document text
    • http://goproonly.com/freezero_game_hack_downloadsjlgu.pdfIn PDF document text
    • http://naturwows.space/romeo_and_juliet_film_ratingzo35p.pdfIn PDF document text
    • http://static-start.top/descargar_asistente_de_google_para_android_gratissb42z.pdfIn PDF document text
    • http://bioforce-co.site/safety_inspection_report_sample_docpbcfg.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/c9f4182.pdfIn PDF document text
    • http://namelesssouth.xyz/what_philosophy_of_life_does_the_poem_a_photograph_reflect7t97x.pdfIn PDF document text
    • http://just-gopro.com/14237429538y635l.pdfIn PDF document text
    • http://chambre.xyz/party_invitation_template_twinkl2lmd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57bd90a-0a3c-497a-829b-7eab00fa18d5/21249535850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffbf158-534c-4073-a38f-9af4a955e538/sumawozimupadojiner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01d17d1-5fdb-499d-a097-f1b717e87abd/how_many_lines_does_lord_montague_have_in_romeo_and_juliet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3afb0f4-49e1-4a54-b7e2-5f962b9e09ac/how_often_to_replace_shark_vacuum_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad35abe-9af5-4310-9ecd-6e415e2b050e/jezotalugug.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_off00010183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 5492 bytes
SHA-256: ba059ab2cd1803048e5c07687050e422e3fd159e8b2a20966ae52ce749b1084d
font_01_sfnt_off0001144a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144A 10312 bytes
SHA-256: 611f2e734e1f4bf5ec2c935c04811b792ad323b0928aad7365311b9cd41ef2b5

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