Malicious PDF — malware analysis report

Static analysis result for SHA-256 227ecc555ba5c1ad…

MALICIOUS

PDF

77.3 KB Created: 2021-03-18 16:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0b725e04f968fde3dc95890b2c84a69c SHA-1: 4d8787e02a41b933f724fb668e9a3a9a82466726 SHA-256: 227ecc555ba5c1ad83704027c07f03e7328f2ee46c0f22fe95c3011ffc16bf56
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary focus on directing users to `https://xezojetit.ru/strik` under the guise of a search result. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a deliberate effort to obscure the malicious destination through a network of disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=how+to+reverse+stock+in+transit+in+sap PDF link annotation
    • https://cdn.sqhk.co/mifigatira/Phihhje/diziwo.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/the_beatles_complete_chord_songbook_hal_leonard.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_5fe0c32d71663.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/7OgjicG/star_traders_rpg_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/jggG1hb/56739007831.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/hijbke4/74873684322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_602b94b7ae942.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/ghgcM0E/diabetes_mellitus_type_2_guidelines.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/e8e71513-b7bb-4ca2-917d-9dc7eb3bc2d2/canadian_model_of_occupational_performance_and_engagement_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ece6832-042b-48a7-a786-242cb35d2b52/diary_of_a_drug_fiend_first_edition.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/2007424851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e76e69b-e8a0-4f94-b44e-ec54c1fec88b/the_power_of_prayer_lyrics_matthew_west.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/bilerezu.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/free_keynote_template_medical.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/wakudufura.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/beponazolamemilusopokeja.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/japumuxopev.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/tapir_facts_and_information.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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 4860 bytes
SHA-256: 19ac54f9fb90754a939d6ae325abaa6f5eee928cc12d224aa659471f1c656135
font_01_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10868 bytes
SHA-256: 717f2bef1be4fd49a988c6c620c0c60b8b0b6fee8aee4efc257c0a49851f2f55
font_02_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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