Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab50bfa73e4b6ef…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 19:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 94c8bd2a9425807106de8e0dbdd41727 SHA-1: 71ae6297046336cadd6945f4a4e8496056afb6ab SHA-256: 2ab50bfa73e4b6ef8c58c8bf85a4bef95438c3b435ce614fe614af8fac238846
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The PDF's structure and embedded URIs indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/award?keyword=barbing+salon+business+plan+in+nigeria+pdf PDF link annotation
    • http://xitnet.fun/kefubumokanepiksks6m.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/42062784670.pdfIn PDF document text
    • https://sozejelef.weebly.com/uploads/1/3/4/6/134600180/3900013.pdfIn PDF document text
    • https://gozopurejogutix.weebly.com/uploads/1/3/4/5/134578339/fedejuta-fitonik-totimoliteza.pdfIn PDF document text
    • http://on-arenas.com/back-_on_discographyhkjpo.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/yankees_2020_printable_schedule.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/types_of_implicature_in_pragmatics.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/sample_business_plan_free_download.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/b5e314818b72dd.pdfIn PDF document text
    • http://3bureaureport.info/apple_carplay_usb_dongle_for_android_os4q24h.pdfIn PDF document text
    • http://mscredit.info/59601791874l19n9.pdfIn PDF document text
    • http://surisetufuna.iblogger.org/89671781541.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/learning_bookkeeping.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/sodukenuk5zd7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_aba61a8c445c435185c9da5a6d3845e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5252f5-c85f-41e8-b303-81340982ba4b/11219044272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be653614-62ef-49a5-8c0b-6a99b80e4c5c/the_monkey_king_cast_netflix.pdfIn PDF document text
    • https://a49ec80b-b4e3-4dac-84ed-d687b6aff6a5.filesusr.com/ugd/46d696_8d9baffdea3345fc983b12adba4f26f0.pdf?index=trueIn PDF document text
    • http://gavemuvivagezed.epizy.com/17849528671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184b487e-3c76-4684-8c02-cf20dc97a67e/barska_36_position_key_safe_with_combination_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f35319-1784-4e3e-9240-3bbbe0df0995/86561108755.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_2fb7e349712b487283e55df606882408.pdf?index=trueIn PDF document text
    • http://wetoxisifogif.epizy.com/worthy_is_the_lamb_guitar_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a2685e-50df-4e29-9943-67553d2f1db4/understanding_aleister_crowleys_thoth_tarot_new_edition.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_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 5396 bytes
SHA-256: 0071b7db926cb6f33024d9c483357068da5d13f720abb3038188c93f68825b80
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 11212 bytes
SHA-256: f057358389fc27928d4d3dbc6cb5c9bf7cddd98ffae966de02f5028654905d47