Malicious PDF — malware analysis report

Static analysis result for SHA-256 219af33517b2a63f…

MALICIOUS

PDF

84.1 KB Created: 2021-02-16 13:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c525b6cc85ff9890284f3883df3fe3b4 SHA-1: dbb0c0c133a0ebd167191db081c01c9ec7d3a139 SHA-256: 219af33517b2a63fce855cb43e672ecbc3fc91b12666fcaeab58a18d741ff882
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=catalina%2030%20owners%20manual PDF link annotation
    • https://mozesejute.weebly.com/uploads/1/3/1/3/131380505/wilok.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ibYgd2c/story_saver_app_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/ctiepjb/58447553685.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/3158d3363.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/LzGigjo/download_cat_war2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/wifQgjr/nizorematimuz.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/adventure_games_for_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/f4ljdhd/7062905210.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/kunin.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/xapidajovaji/formal_dress_shops_brisbane_city_mall.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/geological_time_scale_2012.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/pipor.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/chromatography_questions.pdfIn PDF document text
    • http://rafazusasune.rf.gd/signs_of_a_pimple_coming.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/risk_management_plan_template_for_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/72781651321.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_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 5132 bytes
SHA-256: f9eb9fb57b12dfb4cf697fddfb212dd8c29e3c7a4cca38974948c17c31228f7d
font_01_sfnt_off00011b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4A 12336 bytes
SHA-256: 58414d5f2cc04778a967ef5ae519850e65c5daf86d645ec20a82aec7d46edfeb

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