Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94bb1b14367a1ce…

MALICIOUS

PDF

88.5 KB Created: 2021-03-24 21:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e40cd1cfd135125f650a3dc071f9ee83 SHA-1: b0976b5dbaf290ca5ed566eb622a33c94ac58ebc SHA-256: d94bb1b14367a1cee8718776b922879b68d50c55dafbbb790b74d00c7c0555a3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning model as malicious. It contains numerous external links, including one to 'bologen.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates a 'for sale' lure. No scripts were extracted, but the presence of external links and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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=ft-950+for+sale PDF link annotation
    • https://cdn.sqhk.co/gojogefe/jCggieW/36583129656.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/study_island_answers_math_7th_gradell8mn.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/QGPUgjk/felerelupugo.pdfIn PDF document text
    • http://shimano-stradic.ru/203210440486lbms.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/4ICggii/rider_waite_tarot_meanings.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/cicaplast_baume_b5_bula.pdfIn PDF document text
    • http://loveworld.club/kicker_motor_brackets_swim_platformrrn58.pdfIn PDF document text
    • http://wow50.pro/dog_care_merit_badge_book39imu.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/iggOggm/424322230.pdfIn PDF document text
    • http://boothattendant.com/waste_king_garbage_disposal_reset_button_locationj92uy.pdfIn PDF document text
    • https://cdn.sqhk.co/neguvobipa/gicibhK/81039800901.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/ZFAtjfb/ted_talks_brene_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/tukuxiveg/iiiibjd/onedrive_for_business_login_issues.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_6033d5e313e5d.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/dide8je/the_coupon_boutique.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_604db44208598.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/Pzijhz4/nirufijipi.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/ib1WPgc/detemupukefisufaminotoxob.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/prohibido_enamorarse_de_adam_walker_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5fe93854907c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_e7b43868872245d69dd27368fe224b1b.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/87536196869.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_416965327665453b82021be9bb73ba4d.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_905e15d77244407d8af536700f1d9523.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/can_i_sell_food_from_my_house_uk.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_3bb89432f121470e90003c08b881b5d0.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_8fcae09faa0f4bc29362f61cdeb51a7b.pdf?index=trueIn PDF document text
    • http://mozaninukokefef.onlinewebshop.net/advertising_notes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 5168 bytes
SHA-256: 13828777de81d6820dfeee9a07ceedbeefaafd31a3b559ace1c7fde96c277941
font_01_sfnt_off0001145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 11864 bytes
SHA-256: f33971e72ccca90671a63806cbf375b135f863ff01eccfb3a0a41759ff18db43
font_02_sfnt_off00013d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3E 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501