Malicious PDF — malware analysis report

Static analysis result for SHA-256 b330be60635f8279…

MALICIOUS

PDF

75.8 KB Created: 2021-05-13 23:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b4565f8b9f2dc003055d263b9245ff57 SHA-1: e993e31de472720f812235700ecf8016b1002525 SHA-256: b330be60635f827930551af676735eeda6bbe526160fb5ad57b4548769a7dc93
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=how+to+get+a+bigger+chest+with+resistance+bands PDF link annotation
    • https://cdn.sqhk.co/goxobuve/je5BQgi/79209696952.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/3661912.pdfIn PDF document text
    • https://suwodofiwimi.weebly.com/uploads/1/3/4/4/134495338/3055561.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/nizinazowi-dutav-xibirevubafeka.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/xokakonomalubeluzodi.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/iegiJhe/62258833758.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/38cKPqP/horse_animal_coloring_color_by_number_pixel_art.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/iTia8jd/alman_dili_luget.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/IjjSieR/84697120722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retuguru.epizy.com/virtual_android_9_app.pdfIn PDF document text
    • https://16cc4848-9a85-487f-bc1d-da55f68f8448.filesusr.com/ugd/dcf86b_940ee9099a5f464faaeb74998b351f64.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_36c97784dc1a4392ba3caccb39e6c801.pdf?index=trueIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_4008188d2a244a99a77905fbebb583b4.pdf?index=trueIn PDF document text
    • http://rumejumobu.epizy.com/debodirusibave.pdfIn PDF document text
    • http://xivoganunew.rf.gd/35865689179.pdfIn PDF document text
    • http://ronageze.rf.gd/harry_potter_and_the_half_blood_prince_game_pc_download_utorrent.pdfIn PDF document text
    • http://bepurerenutaf.epizy.com/cut_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/visiting_card_format_for_catering.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_e552576d088a49d391459ca47d1ec9b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/6940725310.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/hard_filipino_riddles_with_answers.pdfIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_9646050268f348a59e80b71e309255df.pdf?index=trueIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_e6ac187dac894d199f5d59d715744070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/dupeta.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_off0000e91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91A 5360 bytes
SHA-256: 7898d8184a9c7f748114b329399fcbe45306466e3bf4268a845100fd86e9d7ac
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 10696 bytes
SHA-256: f3485773214d2d8ae3765951a214a3907bf01478d5ba23ea2a2397fd8df8c7aa