Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe12c6c0f723551…

MALICIOUS

PDF

78.0 KB Created: 2021-06-07 15:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 558438de4b79d663ddcfde6773597475 SHA-1: 050d223e62bc3dd00dc17c6ab805a77ab72c4e66 SHA-256: efe12c6c0f723551dec9a45b8e3a050e48d466d555278587cb76a8b1fbbd05cb
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with a prominent one pointing to a site offering a 'free download halo 3 game pc full version for windows 8', indicating a social engineering lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to distribute content via numerous disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/pbw?utm_term=free+download+halo+3+game+pc+full+version+for+windows+8 PDF link annotation
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/dagimulitose.pdfIn PDF document text
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/jefesenodono_tekurediveloj.pdfIn PDF document text
    • https://sozivaxuzafuzi.weebly.com/uploads/1/3/1/8/131856435/xigiweka.pdfIn PDF document text
    • https://tekovotobu.weebly.com/uploads/1/3/5/3/135319939/jobopipumibuwu.pdfIn PDF document text
    • https://tuxenovizomojow.weebly.com/uploads/1/3/7/5/137516496/magapa-wovib-mijetinovupa-nukogow.pdfIn PDF document text
    • https://kowirakixodoxe.weebly.com/uploads/1/3/4/4/134467502/4273848.pdfIn PDF document text
    • https://wenibowefopari.weebly.com/uploads/1/3/0/8/130814001/relikadaxukuti-gonokopasetaga-rewosexol-zoforawadukoge.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/2982373.pdfIn PDF document text
    • https://lakupemeza.weebly.com/uploads/1/3/4/2/134235705/f812564f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafasuvolo.pbworks.com/f/how_to_get_smule_vip_for_free_2020.pdfIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144505089/can_you_disable_bixby_on_s8.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/vadajojowofezu.pdfIn PDF document text
    • http://xemademeku.pbworks.com/w/file/fetch/144693186/cpc_ubicacin_en_freightliner_cascadia_for_sale.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144425718/how_to_clean_a_lavazza_modo_mio_coffee_machine.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144439599/how_to_clean_my_airpods_pro.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144422313/public_administration_books_for_upsc_optional.pdfIn PDF document text
    • http://mitamugukojo.pbworks.com/f/kexukugenobel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91b9f61-606a-42e8-a5ca-bbac00457b5e/punubazafotigemijafifoxek.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/f/network_unlock_code_for_cricket_zte_overture_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7df0cc-e68f-46fa-ac2a-ebb38b33408e/ez_bowz_bow_maker_instructions.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144549726/discografia_vicente_fernandez_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900dd7ef-42bc-45ea-aed8-1fea7c60e645/remubasilelupibebudoxugem.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_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 6032 bytes
SHA-256: 811e34729fad02d6d4a79c923bcea99cb31039ae83c8c1a8a300ff1bc6341d05
font_01_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 10604 bytes
SHA-256: c5f75dc3a1125576fefd760e85e206c4d1eecafca9851689a68b738e9ea5c149