Malicious PDF — malware analysis report

Static analysis result for SHA-256 559592723b188702…

MALICIOUS

PDF

66.3 KB Created: 2021-03-12 08:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 99ec253a002e7351140bbefe8cd091d8 SHA-1: 1a02fe9e93822b1847c58eef5b8556876af24425 SHA-256: 559592723b18870286398e7ea08eb8216622b77f1b13d4b918513cd14fdb8850
126 Risk Score

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 link farms, suggesting an attempt to redirect users to malicious sites. The presence of URLs like 'https://jottigo.ru/123?utm_term=shooting+games++laptop' and 'http://martans.space/miwajupoxoxa5ebu.pdf' indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/123?utm_term=shooting+games++laptop PDF link annotation
    • http://martans.space/miwajupoxoxa5ebu.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/gekapumofejabokawoxa.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/karajusuxum.pdfIn PDF document text
    • http://static-start.top/geography_trivia_quiz_questions_and_answers5dwb0.pdfIn PDF document text
    • http://legalevi.22web.org/incident_reporting_system_iaea.pdfIn PDF document text
    • http://metaleagle.ru/que_es_el_taller_artesanal2xfyg.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/invicta_watch_battery_guide.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/94160439655.pdfIn PDF document text
    • http://ragukir.iblogger.org/30891427074.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/sitozi/great_writing_5_greater_essays_tison_pugh.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_3f798bf9f68f42778c3dc9f26d6de8d4.pdf?index=trueIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/how_to_renew_your_ohio_notary.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_acad4e4defc745e0a638c7b5e8523417.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/pasevo.pdfIn PDF document text
    • http://kojavigetizafi.epizy.com/chuyn_sang_file_nh.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_39c09c5e80d44d87b19c3d56b2a8a449.pdf?index=trueIn PDF document text
    • http://xivoganunew.rf.gd/35865689179.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/which_is_the_best_roulette_betting_system.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/physics_20_textbook_pearson.pdfIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_1d67b22ff60f4ab6a3dad1961d1c297b.pdf?index=trueIn PDF document text
    • http://tanozetodane.rf.gd/78817943439.pdfIn PDF document text
    • http://rubabup.epizy.com/why_is_my_security_camera_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/12981171562.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_off0000c90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 5240 bytes
SHA-256: b113b84432092747731fa18ddf2b3a963c296b465408a7adf3f711cf5956c3bb
font_01_sfnt_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 9900 bytes
SHA-256: 8dfd59bef7aed2ce2c18bdf73009530f87f2276e8bcb91117486bc010cc9257a

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