Malicious PDF — malware analysis report

Static analysis result for SHA-256 309f898acbf1d75f…

MALICIOUS

PDF

69.9 KB Created: 2020-12-14 19:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 197e2ff01568e260d5b9b1bbecf2fea0 SHA-1: de012dcfa1abe57b2ef24410f32bdd0299c6ddba SHA-256: 309f898acbf1d75f8522366f6d28c52364f5cf739bdf3f76da327d0c19c93f87
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 0.9997

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://traffine.ru/123?utm_term=2016+volkswagen+beetle+owners+manual+pdf PDF link annotation
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/0fd9e5444ec660c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc1d444eaf37e3b64df9f51/1606538312852/78998866077.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d691a13a450babf3b7c7/t/5fd17dd67c12252903eb2a69/1607564760088/veloxugefeja.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b2d6609fd0ee7b07d3c/t/5fcc67c024c49707d316e36c/1607231424729/offroad_car_gl_indir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d2b90a2757459bfc0ed4/t/5fcf0c0b8b174454e996bfe7/1607404555431/lenovo_thinkpad_charger_wattage.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/beowulf_movie_comparison_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb300ee3-1186-463a-bf34-b77de8f193f9/zawopapejapalafelob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5abc8084698658e7ee89a/t/5fd5fa54491a58544a060e47/1607858772983/cepheid_genexpert_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/xugujijenokatisisekurupa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59e7a97599144eeea7ff/1606375911858/zeduderun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18716ab79f442f22e10f3/t/5fc80e43c29ab63a4f66d51a/1606946372101/knock_down_the_house_netflix_review.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_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 6104 bytes
SHA-256: 0baa2b075e10098a6d4afbd285f139e1ace41a12d5ba2e18bc4b8b90f3b15e33
font_01_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10704 bytes
SHA-256: d5563c2663fbab8d99654541d313e47eb93fbe00166512c2020e23f714f73201

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