Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9be01be74dc4293…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 17:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c84f889f04b981dc30693b79cae78682 SHA-1: f445cdbb2ffd73adef8e4af1d0fcd3f58564dab7 SHA-256: e9be01be74dc4293e8b3b3d680c1fa548f1144cb7d439bd62ee1b5aa5ef42a6e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'Wotlk alliance leveling guide', which is likely a pretext to drive users to malicious websites. The presence of embedded URLs and the link farm heuristic indicate an attempt to distribute further malicious content or conduct phishing.

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://baarspo.ru/wix?keyword=wotlk+alliance+leveling+guide PDF link annotation
    • https://cdn.sqhk.co/rugofufol/heigoih/32799508125.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/drnghji/food_wars_season_2_dub_release_date_netflix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5ff77a0fa6361.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/asibhaa/zizulekerazifuzifedokan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_5fde16ab497bb.pdfIn PDF document text
    • http://retenenu.iblogger.org/what_are_some_examples_of_informational_text.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446280/normal_5fcab896b70b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388424/normal_5ff85c30474c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487208/normal_5fe873dd0c06f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedanenek.epizy.com/laxozaru.pdfIn PDF document text
    • http://dukejujegu.epizy.com/48921471183.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/26109545626.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/properties_of_nanomaterials.pdfIn PDF document text
    • http://demiwadipojaz.epizy.com/12103640111.pdfIn PDF document text
    • http://solukirakologi.epizy.com/33233610239.pdfIn PDF document text
    • http://fujirezidixivu.rf.gd/civilization_revolution_strategy_guide.pdfIn PDF document text
    • http://rejusozutugagur.epizy.com/american_psychological_association_style_of_referencing.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/format_case_statement_sql.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/kibabopazedanafifa.pdfIn PDF document text
    • http://ravenofudaviv.rf.gd/wetilufafa.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/baseball_teams_without_names_on_uniforms.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_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 4968 bytes
SHA-256: 96fe883fb1fd35a7dbdd2a3b2ee406b7294ad2c7f461c4838b25548c1d67c341
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 10280 bytes
SHA-256: d7b18b43e1808a5650aeecdf87c59cebfec54c9a49ad660f87f6738e8dead979

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