Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24cb934a4403de2…

MALICIOUS

PDF

136.0 KB Created: 2020-11-08 05:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fe518af2dda50168314bc3d56499d282 SHA-1: db1569353dd2a7d4b2aded292ecc63fad29b8fc7 SHA-256: f24cb934a4403de22c89266d1816487868da8834beb599ccebc5f7de7ecdb3e6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://traffine.ru/123?keyword=c-way+user+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f877a7023327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fa644101c265.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/c3b40cdb-d10c-464f-95bd-9c7803431d7e/make_a_meth_pipe.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/garodafokokovapus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ab079f-3fcd-4cd2-991f-4ae29a69e928/zootopia_judy_hopps_porn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085ae71d-f922-4bfe-b008-3fc34969fc42/novixamobodakavuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/kijodawinorogovoduja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a317aa2c-b20d-4ee9-8310-70e77922e01f/33025395945.pdfIn PDF document text
    • https://vobaves.files.wordpress.com/2020/11/gizmos_cell_division_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/ropoxisipolawovi.pdfIn PDF document text
    • https://bobikebuf.files.wordpress.com/2020/11/2227482432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6215d6c3-b34c-47b0-9575-1b502c2fb222/zenonopusofu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B924 5308 bytes
SHA-256: c1a9158c6fdc4c742ee6f87616544bef05c217298db1deaac30eebc9fe80b5eb
font_01_sfnt_off0001cb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB61 18052 bytes
SHA-256: 008e7c5959092565da853d8d581e3cf9c018add09b748ed3ad0e7fb7896cfa78
font_02_sfnt_off0001fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD11 16096 bytes
SHA-256: 59f25101cd77d4621f4bc3ea89de415cd352e42e4eee30cb6a1526e1b40d80c7

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