Malicious PDF — malware analysis report

Static analysis result for SHA-256 17afe3e86f6d793a…

MALICIOUS

PDF

75.2 KB Created: 2021-04-04 19:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a9cf0bb8fe7648565d50fb21cbc251a3 SHA-1: 2859bf1db2cbc6962ff456f4dc84807d98d1d9b5 SHA-256: 17afe3e86f6d793a9677f7f77ac1e5fa66be4b42258e9eaf57f9f6e2663790c2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URL `https://lozipotod.ru/strik?utm_term=how+to+clean+printer+hp+deskjet+2545` is likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+clean+printer+hp+deskjet+2545 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370746/normal_602b59a9f233f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6020b463dfff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_6011e36a87d23.pdfIn PDF document text
    • http://nudistoff.club/acer_aspire_v5_571_enter_biosy69i2.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/vikudofedumet.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/Egfjdid/2048_balls_3d_mod_apk.pdfIn PDF document text
    • http://igafnd.org/34768224017fvnyl.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/jazalofi.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/galaxy_tab_4_sm-t230nu_update.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/19068910499lbe98.pdfIn PDF document text
    • http://anarchymedya.com/bekajpqm33.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/23348385269.pdfIn PDF document text
    • http://jushq.club/reporter_news_job_vacancyl8tfk.pdfIn PDF document text
    • http://lobafor.mypressonline.com/vusojoxipowa.pdfIn PDF document text
    • http://italysummer.space/ielts_listening_answer_sheet5bc0l.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/0WGdquf/medbridgego_sign_in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_602ab2b208b33.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/LggiljG/super-_skill_pinball_4cade_rules.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411682/normal_5fded94f0c78e.pdfIn PDF document text
    • https://cdn.sqhk.co/kenalexuvexu/hdiiYjD/screen_recorder_for_pc_gaming_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/similarities_between_abraham_lincoln_and_andrew_johnson.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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 5700 bytes
SHA-256: a9ffe9d9eb4ad65a2ef3a2455494ba15ad5443e86c82b84ad7b7e5e1fc920618
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 10112 bytes
SHA-256: 4c0649a992e00669c0fe48f5a11fc6d5d81e71cf851c0ef99c1c6778ae9ab8d1

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