Malicious PDF — malware analysis report

Static analysis result for SHA-256 971474d39a5a6039…

MALICIOUS

PDF

68.6 KB Created: 2020-12-30 01:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c7dfe58f9e2c027b41e93b47f03af963 SHA-1: 9240ec8df742deb9671c9ce848edb43723a32411 SHA-256: 971474d39a5a6039454d01a39d4cff998a974bff054bb8642c22f92c176d6f15
156 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 ClamAV and 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 0.9998

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=rockwell+band+saw+fence PDF link annotation
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/5161154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fbed1863ad5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5fe42f1d071fd.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/jupafudilorafaveg.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/13608e.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/tojazudibumogab/liwiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nccn_guidelines_thyroid_cancer_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b948091f-f3de-4b11-aa5a-4e2fb0e98b05/cooler_master_stryker_se_full-tower_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daae2161-85cd-4156-bc56-0f454461f692/35751918231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230015db-ad59-4fb7-9589-ca5eead8c0d1/93056752418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c532a6a-0712-4000-8ebc-479e573d4783/jufefezixik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564149e3-8768-420f-9dd9-ae0910c81fe7/radio_big_fm_frequenz_baden_wurttemberg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279c72f7-b7a2-49ca-886d-ffe59a4c32ef/hidden_colors_1_documentary_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/3954715056.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 5220 bytes
SHA-256: ce31e05cf6646d3c615009068e949649ebb8f6750a3f73df4cde7436299fcd43
font_01_sfnt_off0000e23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23C 10404 bytes
SHA-256: d0ed0b95456831c84793a5dd12f0950c74b5c029f61925c94337e2f2ce9a8af3

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