Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da2436dc22acd9d…

MALICIOUS

PDF

67.7 KB Created: 2020-12-21 10:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b5fa344d8855c17c9f510958459af2c1 SHA-1: 17f0d174c07a04b51a2276ea0644ec238223cad2 SHA-256: 7da2436dc22acd9d8c23cb917b6c2bf93d1b80b3edba67772a723426c31cfd9b
244 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Final fantasy 7 remake teil 2 release date', suggesting a lure to attract users to click on the malicious links. The presence of numerous external links and the use of disposable hosting indicate a link farm strategy, likely to distribute malware or phish for credentials.

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
  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=final+fantasy+7+remake+teil+2+release+date In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/6949887.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/edfaf154bb7b22.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/9012615.pdfIn PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/330d35de3256.pdfIn PDF document text
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/525411eb.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/lisegazematukuburul.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/7c477dd5-070b-485f-9df9-15743d85a00a/interpretive_biography_denzin.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/68129878363.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2bb02085bf90c0e0909f1/t/5fc763683ac9c763f4d72b87/1606902632055/flightstats_historical_flight_data.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7aee01c59a74bd99208bc/t/5fc9679aed280e32aa82573e/1607034778729/tidekibekor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc8ac23-6115-47ba-bda9-e0c4fbd1af0e/foundations_of_finance_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13287996-9628-4442-af45-8a97eba1f1f6/drafting_lettering_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57923bc-87b6-4539-914b-ffef4188fa1e/21499279825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d73802-a632-4ded-9291-c9a333381efe/m_audio_keystation_pro_88_keys_not_working.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_off0000cc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 5384 bytes
SHA-256: da4dffcf50f35e135fb15c0c235aab134f45e00f12188aa7c59648a997f2c315
font_01_sfnt_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 10408 bytes
SHA-256: b075454104c4ae0d17aa09756ddb3e40cd1d7391ef6105c54152ec3521b81aae

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