Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3fddfbf2aee7a5…

MALICIOUS

PDF

68.0 KB Created: 2020-12-10 09:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 73faf1dfb9577367a5d7476a962f9bd2 SHA-1: efdd95e3f3ecf1fe370868d23aa6d614b250c185 SHA-256: 6f3fddfbf2aee7a576d346629bc5f80f785afbf5ca1b6aa73803744d969e62fb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

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://traffset.ru/aws?utm_term=air+pollution+causes+and+solution+pdf PDF link annotation
    • https://suvuzijovibalis.weebly.com/uploads/1/3/4/6/134660606/xosowizavixu.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/07e1c269-69d2-4462-b0d5-f68174be8d5e/xiduzudeberasebodoluweti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bee7e45-43f6-483b-8ac6-9dec0e784f06/bitobudevero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc3d883-e142-482d-9572-db8b673eb0f9/wezuribedajor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceeb86cd9942793f247bc4/t/5fd1a8b3fec2791e31042db4/1607575732344/word_world_new_word_games_puzzles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec5215d-9ee3-409e-894a-e5360d4de383/38355056218.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf00c5147b14804f7dc15/1606283277754/sapabutowef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1187f978-4d75-4469-8548-2624ae41bca4/spokane_county_court_viewer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30d185bcb0228a2907835/t/5fcf0d5714319a51dc28ebd8/1607404887389/matapobre_word_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc153c35147b1480464d98e/1606505411733/how_many_ml_in_a_shot_glass.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ffd688c99b6d37c18e02/t/5fd1cf9d23f2866aa389ffab/1607585694577/20346534423.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3d80eaf37e3b646737af/1606303104576/ashley_furniture_futon_beds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516f028a-b41f-4719-9e09-9902dea64f0d/guvul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc652cfd49dd124475963de/t/5fd0c21a5ec17a4c6698f449/1607516698781/thames_kosmos_gumball_machine_maker_super_stunts.pdfIn PDF document text
    • https://medlineplus.gov/airpollution.htmlIn 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_off0000d005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD005 5140 bytes
SHA-256: c06dd99a8997022ecb4b48407a557991827237d806966712f0e02f4e8e7a8d90
font_01_sfnt_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 9696 bytes
SHA-256: 2deb0f9c718b62a1b1f02f9b3953dd5ea975867d2c2c4e27ca78019c941369b6

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