Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e0fac7de7ba569…

MALICIOUS

PDF

73.9 KB Created: 2021-03-16 08:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e6ae531c9940f2ec30bc83c9e5de33c SHA-1: f46d02b905e87d91a4b783f1134e5de6bb9640fb SHA-256: 97e0fac7de7ba56936c59a1cd910104d47d12a06b70340906bdd28a048d4bbe8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=clark+creative+education+ghostbusters+answer+key PDF link annotation
    • http://iciko.xyz/pexipuwexoxiwosetn8gu.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/jfS3Zhj/72987344785.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/19315943712.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/wozifefive.pdfIn PDF document text
    • http://rubisteq.online/nejubak7zp7l.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/mesamatij_zaxebuxikuga.pdfIn PDF document text
    • http://tenopokas.22web.org/awakened_empath.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/xubiwujifovak.pdfIn PDF document text
    • https://wetuwisiw.weebly.com/uploads/1/3/4/4/134495793/webevitopu.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/CWjdF85/14691815677.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/rukonemujef.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/hehaOjc/pick_a_brick_cup_price.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/rulaguvefizexokuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizuzol.onlinewebshop.net/audi_a4_avant_2020_owners_manual.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/darezuxuxola.pdfIn PDF document text
    • http://vutilunero.rf.gd/fuvolegapesorakog.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/aptitude_sample_questions.pdfIn PDF document text
    • http://ravakalamixalu.epizy.com/betheme_header_builder_plugin_free.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_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 5564 bytes
SHA-256: 19d973e4b5ab33fd74ddb37d80aa7145352ce941e9e807148d5d406afdbb4105
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 11836 bytes
SHA-256: 8668073e333e27c2b7342fdc018215c0b1c377d275cc206a677d68716b78ffba

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