Malicious PDF — malware analysis report

Static analysis result for SHA-256 694002570765f729…

MALICIOUS

PDF

104.9 KB Created: 2021-04-19 16:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 844ed55f45adcdc50aa2a409ef22713e SHA-1: 66d2f425d352aef896938599092e4bf2438a5206 SHA-256: 694002570765f7298142d2c828aa61dc870d8bbdf3ac2f48c2ae2b461b10511c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity, likely aimed at redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://lozipotod.ru/strik?utm_term=top+penny+stocks+yahoo+finance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498702/normal_605d7eb767968.pdfIn PDF document text
    • https://kajagopop.weebly.com/uploads/1/3/4/7/134729443/jakosewarexok.pdfIn PDF document text
    • https://vunejodi.weebly.com/uploads/1/3/5/3/135382889/bapisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_6069279ce3f85.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/engjRp3/switch_lite_bundle_gamestop.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/0Lpif1t/xcom_enemy_within_long_war_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/jaAihdg/advantages_of_computer_based_information_system.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/atqigia/sunemagebifisopikap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_6020590adb617.pdfIn PDF document text
    • https://cdn.sqhk.co/bikuloxisage/Wjifidh/why_is_my_hopper_app_not_working.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/laforuribugeguvuzufis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372753/normal_5fe17a6815f86.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/66aa9436.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/libowebujakux/soruzadurowub.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/where_to_send_de9adj.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/denexomadotiri.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/3158646059.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/thinkscript_input_time.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/authoritarian_parenting_styles.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/bhagyalaxmi_calendar_2020_kannada_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/probability_questions_and_answers_for_class_10.pdfIn PDF document text
    • http://xamukipadu.myartsonline.com/15789910515.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_off00015c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C60 5092 bytes
SHA-256: 7df1741b6adb56adeb7b068d79eb29b93a7006f48b981c528ce3600f4bbcca45
font_01_sfnt_off00016dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC8 12104 bytes
SHA-256: 3407a7b01bfcfd24e80b7a8ab2a7db1bf5c24606ec8d42c9016d2f9f0962fff7

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