Malicious PDF — malware analysis report

Static analysis result for SHA-256 204224af209c8690…

MALICIOUS

PDF

71.7 KB Created: 2021-03-15 15:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: caa681e9359f7a08bd3d5d79a17187fb SHA-1: ec9906bb2e989810d99202e38cfde30dcc32658e SHA-256: 204224af209c869037182623db5900263adeb407ef1c58e22a77267b8641bdce
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent URL, 'https://druttle.ru/strik?utm_term=dell+latitude+e6410+lan+driver+for+windows+7+64+bit', suggests a lure related to driver downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=dell+latitude+e6410+lan+driver+for+windows+7+64+bit PDF link annotation
    • http://farexirofabi.22web.org/clark_forklift_seat_covers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_aaa403e19c964dd9ad2508eec6fbb455.pdf?index=trueIn PDF document text
    • http://gisipevuzugofij.epizy.com/exit_interview_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/23789981411.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/melovovisowanebogesilo.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/direnufefafutose.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/characteristics_of_a_good_english_teacher.pdfIn PDF document text
    • http://rewexukid.epizy.com/aphra_behn_the_rover.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_2ef358cb75cd4e0e8512cca1f3bcbc58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/biotope_et_biocenose.pdfIn PDF document text
    • http://kowotasube.epizy.com/weforuzononiseboze.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/long_way_down_floor_4_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/dj_songs_dance_performance_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/80107475881.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/android_tv_bluetooth_remote_pairing.pdfIn PDF document text
    • http://jasudewibolix.rf.gd/armored_titan_and_colossal_titan_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/how_to_sync_skullcandy_indy_fuel.pdfIn PDF document text
    • http://jifunujori.rf.gd/7331911395.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_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 5708 bytes
SHA-256: 82d9dcbb0650a32b18c8fb8ff004d6261ed0d4471b37fad02a6718f3af6aa04d
font_01_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 10404 bytes
SHA-256: 3724a14a5b98d21108c58032c6daef1bd04a0b747c02907950dbae631b2fa17b

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