Malicious PDF — malware analysis report

Static analysis result for SHA-256 337383b5f9805305…

MALICIOUS

PDF

79.0 KB Created: 2021-04-07 18:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6cd0bd6abf1b11889aaac09c471c35e1 SHA-1: 3f8141fe9c850d41e3c80d725171000b616270b8 SHA-256: 337383b5f9805305f7da931ae075e21013060f8e9b9cade7ca3d1ed48efecc9d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external URIs, including one pointing to 'druttle.ru' which is likely part of a phishing or scam campaign. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to malicious content, potentially for credential harvesting or malware delivery.

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 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://druttle.ru/strik?utm_term=lincoln+sa+200+for+sale PDF link annotation
    • http://meetsalle.xyz/kifef1ezld.pdfIn PDF document text
    • https://cdn.sqhk.co/lowimipofevu/hiEgduX/total_conquest_cheat_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rogumabutur/iaRjegh/average_premium_for_whole_life_insurance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422627/normal_5fca0cd025ecc.pdfIn PDF document text
    • http://jilet2.club/dezegafixefepizadpqcj.pdfIn PDF document text
    • http://creditscorefix.info/luninupidiborubadakepoz6d9p1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_60379508c9e1f.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwune/aggwQje/the_kominsky_method_season_2_episode_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_6005f7cd9d388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_60419a6b3e71c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488336/normal_5ff0348b629f6.pdfIn PDF document text
    • http://dominis.xyz/beats_studio_price_tagznr4a.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/29485653823935vh.pdfIn PDF document text
    • http://nikecortez.net/tukajidexumejolebu0i2yq.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/cjfFjdr/49310919437.pdfIn PDF document text
    • http://erogan-encolumbia.site/apache_ignite_tutorialbfbzt.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/jicjeif/coordinate_geometry_a_level_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_60351a7778e7e.pdfIn PDF document text
    • http://adminhalil.com/24561440851sda5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_4ebc7b5a8a754d19a7173368d79e6004.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_7e3e25bfd9af4b06bc717a538a9824d9.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_6c58077f0c98447f9b88f8dac82979f2.pdf?index=trueIn 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_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 5092 bytes
SHA-256: ef14a847b756fc9ecbcbb4b91b44b9b0e2fcc8a03f7ae9decc53fb0a4d52f014
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 12080 bytes
SHA-256: b2c22f5be08221a5af91be204b236f92ef1c503d1ac52bded31610bd3aa9955f

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