Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc70e78257bb60fd…

MALICIOUS

PDF

67.1 KB Created: 2021-04-02 11:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c2a8e46ee2d2dffcffc04743a632dcbb SHA-1: ed3ae3713d957f7f394d0b5f92813f62e519b9b9 SHA-256: cc70e78257bb60fd7aa334acc6bbea142f3ac925a4ff3c740b9ac0e38cfadeff
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with at least one pointing to a suspicious domain ('soxebez.ru') and another to a link farm ('gelokan.sportsontheweb.net'). These URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=how+to+crochet+a+square+rug+for+beginners PDF link annotation
    • http://gelokan.sportsontheweb.net/bonesaniwatewiwataxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_60073625e6cda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5fec4e706db7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527108/normal_5ff2913c7e057.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/how_to_write_a_good_poem_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_60199ac55aa3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_6044fb00c772f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_5fd961c98381f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_5fd95bc590fd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d5c267c9-6553-4493-86b4-7b96f81dee8b/death_note_anime_netflix_country.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c180d9-5169-4439-8f16-f3bcdf7d6a0d/92209634224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a424cd72-c713-454a-905e-90872911ae40/how_to_define_human_trafficking.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/fonts_photoshop_cc.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/mawawisofidawiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad274003-ee45-47ad-b2ab-a45e1a682ae6/rasonulodalebabidaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44c829b-585e-4014-8770-addd42ffc229/60976245630.pdfIn PDF document text
    • http://fekejuw.atwebpages.com/43490818003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83cbaf5-63e3-4f6f-a581-7a8ff665e060/the_smartest_person_in_the_room_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf5e996-74a4-4da6-a1c3-d0df3b1a3baa/82166018149.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/maxusomilejububo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294bc549-a919-40b1-9c44-83be7aadbef6/tone_shift_in_the_road_not_taken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534de239-419f-4171-b4e1-eff9d5f24491/jiforudetodapedamabekoxok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1595bfe4-0cc6-4b5e-859d-24d7b3575ee4/58455138210.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07E 5312 bytes
SHA-256: aa6cc456453a3ce22db73e5d85440f4a99e8532bc762e8508dbbe37ef18082f7
font_01_sfnt_off0000d294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 9116 bytes
SHA-256: 179d993d2c2c258134be6fc35c63fb34756ee596b3ed2e84956ea75f781cc439
font_02_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3