Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1fb929d148c268…

MALICIOUS

PDF

84.0 KB Created: 2021-03-18 09:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0b7d17d154fc4886ac9b19a3addc3411 SHA-1: bcb7798f056756d442e5e59d596752a6f970abb8 SHA-256: 3c1fb929d148c2687fe3695f3299419ea6c76634f114ffa7091255f3dd29b907
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'seumenha.ru', suggesting an attempt to redirect the user to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further supporting a phishing or malware distribution motive.

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://seumenha.ru/strik?utm_term=elastic+resistance+band+training PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fc693e396b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5ff51def42ad2.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/zisaranawejovekada.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/87b53ccb632.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/1430125.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/vatemofamugofalovi.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/46895084917.pdfIn PDF document text
    • http://mevuvil.iblogger.org/duxolekededajakuzonex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_60511250d6933.pdfIn PDF document text
    • http://wexoxunesixu.iblogger.org/free_healthy_cookbooks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425926/normal_602dfeb672f6b.pdfIn PDF document text
    • http://dipufuvolog.iblogger.org/is_nordic_track_good_for_knees.pdfIn PDF document text
    • http://puwaxevajineluk.iblogger.org/33923664890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koxaxinum.epizy.com/goblin_5e_character_sheet.pdfIn PDF document text
    • http://gobiburitumeri.epizy.com/number_of_shares_outstanding_on_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/tovugajimilutamojir.pdfIn PDF document text
    • http://tefuwileb.rf.gd/derisifito.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/mebotigixumomapexebe.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/definicion_de_conducta_antisocial.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/90116117497.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 4880 bytes
SHA-256: 3b8312dd2c93151db6a4623b7f40874af52a9b768fb1f930c98d8a86f893f3cc
font_01_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 11300 bytes
SHA-256: 8f8ce40fbf8357329053338b71654676506c02fc067f558966906218505a675f
font_02_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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