Malicious PDF — malware analysis report

Static analysis result for SHA-256 df694a4d6a394a16…

MALICIOUS

PDF

64.9 KB Created: 2020-12-02 05:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2d3a326daa96be85830036304e2e2748 SHA-1: dbab9316795dbf0dc387a11ec565716a4c08ef76 SHA-256: df694a4d6a394a16801e638604073aa308402dff2532431fd6710ed00f082da9
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'Yonkers zoning ordinance', indicating a potential pretext for a scam. While no scripts were directly extracted, the presence of numerous external URLs suggests the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=yonkers+zoning+ordinance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fb5e4b5cba4e.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/1469071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fb3ea298e424.pdfIn PDF document text
    • https://lawawumusew.weebly.com/uploads/1/3/4/7/134765042/5554909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/amicar_package_insert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a4393e-1094-4942-bd4b-6059b3bfa61f/6633472041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef48d38c-092a-407b-b302-83c13b1c7ec5/first_aid_step_2_ck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f54cc8-c73d-44de-8793-bba08c227fce/tenu_suit_suit_karda_mp3_song_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5968840f1034a5cc8ba68/t/5fc6f953e2dcb1274de2ad33/1606875475827/muripisifojo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf600a1972c46e3c96622f/1606377485705/1888255329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5deb8a-a1dd-4e46-9dbb-2fb41e771067/94360782856.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bf1b9955c744b53ac36d/t/5fc0e44da97599144e180580/1606476884285/martin_heidegger_what_are_poets_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5114bbd1-9a41-473d-97d6-5f35ec1c4bf3/rojuxeximotesevubogi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a5383dfdd95b60da62a1/t/5fc2be9b4f9837572039e720/1606598301754/how_to_burn_cd_from_itunes_2020.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_off0000c26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26E 5152 bytes
SHA-256: 3ea26c7fa7c51592d0979965afa58415f73559d08973c867975f0b98a6fa1535
font_01_sfnt_off0000d40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 10348 bytes
SHA-256: 3615e08475186321efcf00a61e79a8af743768c7baa4d56ac499ff8a9e7e8d71

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