Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d529a757565f36…

MALICIOUS

PDF

70.6 KB Created: 2021-03-16 23:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: af4b9f05c18844fac99d8e6fc20e907e SHA-1: 74b9336d4495b8464821e0c3166bf3c3e8dfdea0 SHA-256: 34d529a757565f36fa89bc62af96fe4a843b1a72506538c7d11e6636a6b02e8d
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. The document contains numerous embedded URLs, many of which point to disposable hosting and are designed as a link farm, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the variety of URLs related to song lyrics and loan information indicate a lure to trick users into visiting potentially harmful sites.

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://nipisod.ru/123?utm_term=jatt+yamla+pagla+deewana+dj+song PDF link annotation
    • http://vuvopogawuxaxax.22web.org/xoremuxugexiguravafazo.pdfIn PDF document text
    • http://geniputan.66ghz.com/get_instant_payday_loan_online.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/gdgf0jv/badefoxigugagitaro.pdfIn PDF document text
    • http://tadiminag.22web.org/final_fantasy_7_remake_walkthrough_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5fc68aea1cef6.pdfIn PDF document text
    • http://legejuwarowu.22web.org/bawsaq_investment_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_604ffa61c231b.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/eohagB7/270_two_seventy_us_election_strategy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawunivirufoz.epizy.com/away_in_a_manger_song_lyrics.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_98628cdde9e648f3aa198aaf76643ac1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d61281-309f-40fa-b72c-92089afc5914/pisobukowonawuriduvigisiz.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_843087c8f7964240a7da742416a7cbc3.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_e0f65fe4ce2d48ae81d4f2629cf0f027.pdf?index=trueIn PDF document text
    • http://mudoxaw.epizy.com/s_resident_evil_4_ppsspp_zone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c9b8fa-d194-4aeb-8a42-48fc65576667/nawubi.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_f1a01edf10984d9f9bf58d34c2940950.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_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5444 bytes
SHA-256: 007b3a395f91f20830728598e63fcf973a0c903f2b18305eedaddb72fed98da8
font_01_sfnt_off0000eaff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFF 10064 bytes
SHA-256: 7ff1ea2b3d143327a09059207d5d02dd8f5e9171160443ba55186c3c3f6f6420

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