Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e313ad65760b3bd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-04 14:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e43ec6be5f71febf9b0a67d91c2e59 SHA-1: 148797fa0ccb8561925ee61ac00622c32e9f2e72 SHA-256: 0e313ad65760b3bde30dededaee32646d565c0575f23a8296b755a5848013d5c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or scam lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=what+foods+help+get+clear+skin
    • https://cdn.sqhk.co/sivumazudi/b0ia1hj/25039016688.pdf
    • http://vurujupafowutox.mypressonline.com/gotiworizobafis.pdf
    • http://vijexibat.mywebcommunity.org/how_to_see_cracked_passwords_john_the_ripper.pdf
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/wetixurifoda.pdf
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5fdc5929f3efd.pdf
    • https://woxoxoba.weebly.com/uploads/1/3/4/8/134893248/6084588.pdf
    • https://cdn-cms.f-static.net/uploads/4446273/normal_602e65f538f6a.pdf
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/mofevabanigubo_zelosise.pdf
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/lifomaduwoxigudom.pdf
    • http://kazexajisodibu.medianewsonline.com/foxit_editor_crack_download.pdf
    • https://cdn-cms.f-static.net/uploads/4369508/normal_6032fdbcc5aaa.pdf
    • https://cdn.sqhk.co/ropimipaf/izHPBfh/54257164346.pdf
    • http://vegifeda.mypressonline.com/94986552258.pdf
    • http://xoxibusu.iblogger.org/honda_gc160_5.0_pressure_washer_replacement_parts.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fulovobalume.rf.gd/boy_scout_popcorn_2020_flavors.pdf
    • https://s3.amazonaws.com/mokamoba/ziwerigu.pdf
    • https://s3.amazonaws.com/wuxupewu/what_is_the_objectives_of_social_studies.pdf
    • http://pomisatavep.rf.gd/fearless_friday_basketball_3a.pdf
    • http://rewakagofeloze.rf.gd/annabelle_creation_2017_full_movie_free.pdf
    • https://s3.amazonaws.com/ziwuvijevo/7366817681.pdf
    • https://s3.amazonaws.com/xomudufe/responsibility_accountability_matrix_template.pdf
    • https://s3.amazonaws.com/rirusozo/d_m_full_form_in_police.pdf
    • http://rovafitazilom.epizy.com/mechanical_engineer_jobs_in_canada_for_freshers.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_off0000ec23.bin
43d9051198d1efcfeaa7ab74b32ecd6e407045ca756950d927b053ce5fb174ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 5492 bytes
font_01_sfnt_off0000fee3.bin
0ef43c6f085c2167bf364d4703a20cb668237b8a110fdbc17c96853554ed5791		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 10296 bytes

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