Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1ea9c5dddad1f5…

MALICIOUS

PDF

79.8 KB Created: 2021-03-16 01:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e87fc31055c3cc7770b43683e06cd5b SHA-1: 19599ea554ae2d800c798b54af4c1f22aacd1e2f SHA-256: ae1ea9c5dddad1f534727af810cd3c30aefaf40f27cf50a4ec45d0f437153043
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru' and a query parameter suggesting a lure related to tractor battery specifications. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=ford+3000+gas+tractor+battery+specs
    • http://rowomonug.mywebcommunity.org/free_subject_and_predicate_worksheets_for_4th_grade.pdf
    • https://cdn.sqhk.co/ripalufix/Egiihhh/71331373761.pdf
    • http://fulusixavopowem.iblogger.org/unit_1_review_equations_and_inequalities_answers.pdf
    • http://wunanufirum.22web.org/tidehunter_dota_2_guide_offlane.pdf
    • http://soxutabuxupene.22web.org/sogakexufe.pdf
    • https://cdn.sqhk.co/mapibeze/Mhb6ijd/pizirijozizeja.pdf
    • http://wevebuvofuz.iblogger.org/7295406435.pdf
    • https://cdn.sqhk.co/zoxunoromi/skZGhff/50309489611.pdf
    • http://felojagiwubabu.iblogger.org/alan_moore_from_hell_download.pdf
    • https://cdn.sqhk.co/jasurisunav/nSfhfhc/masas.pdf
    • https://cdn.sqhk.co/loberutebe/jiPZhi4/2184623529.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fusifovizit.rf.gd/72941704117.pdf
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_afdf213b7ebe4c03abc9a849d60abc85.pdf?index=true
    • http://kizuwopo.epizy.com/24759494118.pdf
    • https://s3.amazonaws.com/likadojivivofu/lagu_change_up_seventeen.pdf
    • http://zalinejogimi.rf.gd/realidades_2_capitulo_3a_guided_practice_activities_3a-1_answers.pdf
    • http://nebokidib.epizy.com/18018975869.pdf
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_e7a7815c17e5491b973c7d3df717c90d.pdf?index=true
    • http://ruruwuvatokatal.onlinewebshop.net/33834063374.pdf
    • https://s3.amazonaws.com/gupojakami/rikotezodosonekane.pdf
    • https://s3.amazonaws.com/xakapudakadu/word_link_339_level_answer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f96f.bin
8264bac200d9855afb99aee3a46f312051e8ea3d8a413204d51183434e9d9f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 5712 bytes
font_01_sfnt_off00010cf3.bin
a15158400269c7a0c5be4d5c660729b772b84528e281af50422bd680bba68f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 10828 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.