Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2029d2ffc70114…

MALICIOUS

PDF

67.2 KB Created: 2021-01-19 17:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b2bc6d4513575fa1f88c8cc850ecdf73 SHA-1: ec1583346ad82b6daf3fd8b03698456590303029 SHA-256: 7f2029d2ffc70114984c37c275773f9d2ac75785d7bfba574d963ee4b21e1f63
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, suggesting it is designed to redirect users to potentially harmful external sites, consistent with phishing or malware distribution tactics. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are strong indicators of a malicious document.

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://bologen.ru/aws?utm_term=birsen+yay%25C4%25B1nevi+statik+kitab%25C4%25B1+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450907/normal_5fcb4039d1aa0.pdfIn PDF document text
    • https://site-1247005.mozfiles.com/files/1247005/85580410507.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/f2ca374e2862702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5fa376c24f78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f98be1621609.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/kopigudipagusobalo.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/6833914.pdfIn PDF document text
    • https://site-1247680.mozfiles.com/files/1247680/pegavexedoj.pdfIn PDF document text
    • https://site-1168148.mozfiles.com/files/1168148/49643494072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389361/normal_5ff1213342195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fab9587e082a.pdfIn PDF document text
    • http://pedufan.iblogger.org/how_to_use_alligator_indicator.pdfIn PDF document text
    • https://navijaxilof.weebly.com/uploads/1/3/2/6/132696044/wakoratadaku_zibipok_xanajejovene_leliwakodobojem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f907da50cb54.pdfIn PDF document text
    • https://site-1176106.mozfiles.com/files/1176106/1909971121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazifaba.rf.gd/move_music_files_to_sd_card_android.pdfIn PDF document text
    • http://toramowajo.epizy.com/zukibulopoxaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 5448 bytes
SHA-256: 3a1bc17dfa3761d52bd07d06d00c3293c5c0899d53055e4b7985619ca0dadf3d
font_01_sfnt_off0000da1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1B 11212 bytes
SHA-256: 63de31c6abbb184f7298b8c573fd3e4f1dc8dd8c3e6cf5227a129a77409fc7bd

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