Malicious PDF — malware analysis report

Static analysis result for SHA-256 02042d9382c6e926…

MALICIOUS

PDF

85.0 KB Created: 2021-05-22 18:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4186aafee0837fc16206ab4e928de71f SHA-1: 29ce43b401ba8201dc9d221692f3a52fef72b002 SHA-256: 02042d9382c6e9265a72f741d51ba7d1a4a5e146b21b427f314b1c567a8d68cd
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate this is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=marathi+comedy+movies+latest+full+movie+2019 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5ff7653d71ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_606535538338d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fe10a4e4d314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_603c17e42c17d.pdfIn PDF document text
    • https://dinufipaxa.weebly.com/uploads/1/3/4/4/134440308/wamuziba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_5fd78bfc8f9d5.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/dusegedanogepebotogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_6009d08ff36bc.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/sumizalituwir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_603c824aa8058.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/724de4d6-b295-4908-9a13-74d0f4dfde8f/what_is_the_best_strategy_for_daily_trading.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/pevurof.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/medical_bill_credit_report_legislation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2374d0-aee1-441a-9a7a-ae77fc0d285b/traxxas_tqi_transmitter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/54298600452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f395d7f-d11b-4f87-9eb5-45c8f6f73aa9/51423389985.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/26651055473.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/kezobodoti.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/gtt_test_normal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/pdf_go_math_grade_5_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/rusadolezeparijotuzeri.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/sanogumururikunumibevexu.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_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 5908 bytes
SHA-256: d245803357994fe72ee4a472cdbf56da5ba6e7e8d54de3b147fadea53023d975
font_01_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 11584 bytes
SHA-256: db53ba7c5359b3024caa6a3abf4d6ebff3afcb998a96ac83a2bc48db14d00556

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