Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7abe436241420a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-24 22:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e12c23acd12ee7ad953185058886044a SHA-1: 84a5d2933c7d630358079a810988666f2d48ae48 SHA-256: 7f7abe436241420ae6d7d61d90d089d300efeeb883baa24f5a3204cc18a054f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the document is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wix?keyword=shoe+repair+shop+near+mechanicsburg PDF link annotation
    • https://fuwudasex.weebly.com/uploads/1/3/1/0/131071129/3838e87.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/option_volatility_trading_strategies.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/libro_los_de_abajo_de_mariano_azuela.pdfIn PDF document text
    • http://vienvozvrat.site/384841219p8lxf.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/developing_english_speaking_skills.pdfIn PDF document text
    • https://jegumozapibalan.weebly.com/uploads/1/3/4/0/134013344/1188078.pdfIn PDF document text
    • http://faceit.su/85498741193354g6.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/mewupatadobomoj.pdfIn PDF document text
    • http://tovelksa.website/310913182948hpx2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52e6a6a-5e93-445b-b001-cce2ebd4f73a/how_to_pair_big_blue_party_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/59386292541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88265a5-b9f9-4863-b024-e4fb2563fe63/talumaniluzuwufijufolubes.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/weather_report_today_kud_chenani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086477ad-35bf-424f-a685-e6b537965ea6/paulo_coelho_the_archer.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/gubejudiwag.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/science_experiment_worksheet_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/shining_nikki_event_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/artemide_teti.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/17194537880.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/gleim_private_pilot_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b921c1-fc11-4b65-8d0a-36747c51b2e9/dosuzojusufimevefajem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e2f773-6680-4bc4-b9dc-db711680a2c9/what_are_the_rules_for_naming_identifiers_in_c_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/chauri_gajab_gadrail_biya_dj_song.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5556 bytes
SHA-256: 8488de10046fe220e8a0471b2fc1c1562581baaa6d0b23ec2cc08c5625e2afea
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 10864 bytes
SHA-256: 596d740a82542c00321fcfd96817b80ecdcbfdb3124935192c0a779c1dfe3703

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