Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf74ac10f520611a…

MALICIOUS

PDF

76.2 KB Created: 2020-12-07 22:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b40dcb892e54f1c06c4f5d51e931dae SHA-1: 11abad20a56790b589a9b12a34269afeed975331 SHA-256: bf74ac10f520611ae16146ffafe4484fdefcde747f587ac02d997cea11772155
214 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 and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=japan+movement+watch+pc21j+stainless+steel+case+back In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f93446e82ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fc37dd6c0d25.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/2763145.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/womirofop/1-_99_smithing_guide_osrs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/timing_belt_tensioner_pulley.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/agenda_2030.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4e52c964b23c955e2725/1606241874836/zavironozerokizara.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/berix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5614c49c-bcbc-40ed-b337-d03e9430655d/sikoxaxanugesipej.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/52035156363.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/blackbird_tabs_guitar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32334ea4a794d5653bf07/t/5fcd01ff83d2ac65cc16a69d/1607270912514/go_planet_enschede_flohmarkt.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pdf_antropologia_uma_introduo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fac1e1-8c24-4bde-bdbd-4e60b64ca30e/rulokamabigatun.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 8

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_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 5684 bytes
SHA-256: 945c45479e81b01e6dc02e1a7645f7b6cb928a4a24b3e5c1dbde2b774e9b6333
font_01_sfnt_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 10988 bytes
SHA-256: b33b4bf00818f876de8c8a91eba73c27cf1cf4b10c36bfb242a464949db14477
font_02_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 16076 bytes
SHA-256: 12198ed304d8e74df64bcaa8a4aae6da6436d73ceeb6d758e01031f89a18fcfe

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