Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8cba83c68b71f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 18:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3fa61dacb3afb6083bf765dc46de0a66 SHA-1: a463cd77ebdcf646cb2752cbba94771e1b8e0c2f SHA-256: 07f8cba83c68b71f1a32e02da7e73a83004a6d73a088e212cb584e54cfd87172
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ClamAV and an ML classifier. It contains numerous external links, suggesting a phishing or link-farming scheme. The PDF's structure and embedded content indicate it's intended to redirect users to potentially harmful websites.

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 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.
  • 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://jacksth.ru/award?keyword=use+of+primary+auxiliary+verbs+pdf PDF link annotation
    • https://cdn.sqhk.co/getabemuto/3ffJSd7/road_trip_2_beer_pong_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/RhaJRhf/xakazitijin.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/9cc8d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_6032a0ae9a9fb.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/gfliajc/president_2020_election_odds.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/iajd5gi/up_faith_and_family._vhx._tv_activate.pdfIn PDF document text
    • https://polerobozugewif.weebly.com/uploads/1/3/4/3/134344868/9807e37.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/gh2Rhgg/siwilosefabeliwes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5fdd8412094e3.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/ebOR7jb/dell_emc_nx3240_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/heBjiOz/rescue_game_save_princess.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/dJsoVia/toy_story_drop_level_55.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/phdjfgh/mefodovoxajiririsupasin.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/2c10a50f-329c-48f0-a41a-f6cf5790806d/software_development_methodology_defined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5d1c42-0973-445f-b7c3-9158d1895bb0/wadapunoxakojejor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9fb051-2d37-4b17-b92f-5a7939071aba/fubegapejuvobomopegotex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd9bfc7-7ad6-4c37-8beb-8411f9bf2051/pokeboroxuguzaxonaxulan.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/56427983181.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/tabonudilun.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/87711370621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c498f8c3-88fa-4b4c-b1f9-7f68248f31ec/jubaruxe.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_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 5548 bytes
SHA-256: 2a31b86ee949142c143e7dc38ce0ec9404920fbd38eedfe0cb140a22614433ef
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 10740 bytes
SHA-256: 6d1138bc7a811c4cd1d4704a9451d86ddc3e719609959fef54def28466010ce3

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