Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26da597ef8b46cd…

MALICIOUS

PDF

70.8 KB Created: 2021-01-19 17:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e1760757f81d441dc9207bd0986f8389 SHA-1: c1de9e6ece6e1274d54bc0d5f39cc8cf223166c5 SHA-256: b26da597ef8b46cd94df0d81418fa7261476d71be544026899047ec54b943c02
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL points to a suspicious domain, likely intended to trick users into downloading malware. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious 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://traffset.ru/123?utm_term=gta+san+andreas+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f98e99964677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f996f45a20c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fe9558e6c30a.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/about_us_page_wordpress_template.pdfIn PDF document text
    • http://fofoketezifofi.22web.org/83882037737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5ff138c13a088.pdfIn PDF document text
    • https://site-1178100.mozfiles.com/files/1178100/learn_50_languages_online_for_free.pdfIn PDF document text
    • http://wifejopoxakobo.iblogger.org/mathworksheets4kids_multiplication_of_matrices.pdfIn PDF document text
    • https://site-1168109.mozfiles.com/files/1168109/65373977064.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/5c693f0cc.pdfIn PDF document text
    • https://site-1247196.mozfiles.com/files/1247196/30049151427.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/2727454.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/nuxutos.pdfIn PDF document text
    • https://site-1176184.mozfiles.com/files/1176184/14710705064.pdfIn PDF document text
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/pisibofepisonuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/retixukuviziwinasubevute.pdfIn PDF document text
    • http://wepaxilex.epizy.com/10402671233.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/halo_unblocked_games_66.pdfIn PDF document text
    • http://gidubivej.rf.gd/cbse_accountancy_project_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/dukuvevamavusujunomure.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_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 5016 bytes
SHA-256: 32076bb472f80683bbdc656a9bb11d98923cc5982aa4316bec72f2c49429f835
font_01_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 10408 bytes
SHA-256: 3452c9cf5bd256c88d9f6d01a03d2f06c25888396e750267bf1d57d4fcb4250a

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