Malicious PDF — malware analysis report

Static analysis result for SHA-256 19093df69065a621…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 13:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e731aa064717411ee2e983d115fcb98e SHA-1: 0827f731b0bbfd0f3808b74ee8ef96f0a7fded44 SHA-256: 19093df69065a621c51a119f85331ad1b220562c83e8ec039ee531ee47eeafe3
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=are+taco+bell%2527s+tacos+healthy PDF link annotation
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/rumanawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_601638f5683c2.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/higiYhj/vukovabutoxu.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/89446128412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_6049d1809194d.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/VLI6EyW/world_war_3_game_bots.pdfIn PDF document text
    • http://domsale.xyz/suxiraruketodstq.pdfIn PDF document text
    • http://parhelifrl.space/nexokazotekonesanuramawxwx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_60382f1f14dcc.pdfIn PDF document text
    • http://cethq.xyz/advanced_scientific_calculatoro47b7.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/jfYMpgj/81412847397.pdfIn PDF document text
    • http://grantmedica.ru/a_thousand_splendid_suns_chapter_39_summary6eype.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/zero_based_budgeting_in_nigeria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_6039fbcd3cb7b.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/8304585.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/32827684606.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/nezudivovopuvufuxum.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/ledasovasiseza.pdfIn PDF document text
    • http://naditoliwinudev.epizy.com/police_report_accident_ontario.pdfIn PDF document text
    • http://xofafatererowu.rf.gd/hernia_de_disco_cervical_fisioterapia.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_off0000eb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3E 5152 bytes
SHA-256: bc2dbf52c4aa514fa4b4ef22e18add9bb4c396341a560a0f1be74de9920dc860
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 10584 bytes
SHA-256: 1db3b6de322b6a6877827ff7dc32e850a14c9a956f51fc72e954bbf1a9307e16

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