Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed53fb23381895d4…

MALICIOUS

PDF

78.5 KB Created: 2021-02-21 20:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d18ce19a6015d5bc61906bb3ba5d1388 SHA-1: fe532d62e42a8f1a2107a83fabeecf032978c2d3 SHA-256: ed53fb23381895d46dd4c6143ae03b4636716c35cdf865d773b6eb88d50251f1
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, many pointing to disposable domains, and the document body, though heavily obfuscated, suggests a lure related to a 'shopping cart game'. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://druttle.ru/wix?keyword=shopping+cart+game PDF link annotation
    • http://martans.space/29600502373ooeep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495409/normal_6022627f36954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_602faab1c715b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601f04027cdc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_602077d1e3e55.pdfIn PDF document text
    • http://trujillostacoshop.com/kerbal_space_program_xbox_one_update_2020nbwlc.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/cDjcLuI/camerafi_live_apk_serial_key.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/iaOEinf/the_wolf_simulator_forum.pdfIn PDF document text
    • http://mx50off.info/21620103325fbikd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd30f173a9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_6027ca1a41187.pdfIn PDF document text
    • http://tomogorman.com/fivunekunofepesih94.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/jahfRge/classic_train_simulator_download_for_windows_10.pdfIn PDF document text
    • http://sportplays.ru/american_dyslexia_association_free_worksheetsu2wqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fcceaa38baf9.pdfIn PDF document text
    • http://national-verifyteam.com/zavadudojakufaneri7gwhg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 5240 bytes
SHA-256: 011caeefe57c1bc15d010fdfa4f6fca9a6943d484ad242cfe69661b25bb50cc3
font_01_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 10412 bytes
SHA-256: 7796093a75203e60088a3e47c4b771e7c74c8929061950c2f8e8c6d50141eb2d

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