Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c895bc35f22b23…

MALICIOUS

PDF

80.6 KB Created: 2020-12-21 15:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7d3d42650e822768cb46efbd5ec88a8e SHA-1: 9307db122586ca43f3434e500d829ba89964c38d SHA-256: 79c895bc35f22b23264b6b375a3ae16726e219ced092c4fd46536690034347a6
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 0.9996

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=hero+xtreme+200r+bike+photos In PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/900d056b1c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5fb73ca7a9a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5fa14fae199d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476783/normal_5fd97ab0eff8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f9a027a9ba84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_5fbdcbbc1bb78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fcea2ce2768b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/wurujujavagi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdec0a62dcd53187f2068e5/t/5fdfbba58afbbc27177bd2fd/1608498085707/filmywap_2013_bollywood_movies_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/sokal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c79f9f-2c98-43c6-b001-24b722d31bc5/40811833719.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc9c34de4017829c16a05ba/1607058253485/6471792168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ea4978-ac50-46e9-9d85-d7b19d6bc656/batebolikized.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC640 5324 bytes
SHA-256: feafecc5494c20d9398cac7b3defae9c70829ce8dd59e56598b96b2ce65983d7
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 12456 bytes
SHA-256: f0609fc49eef1224456646db26353585a7da64f3bb1c4e0533f5692770f10282
font_02_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 10908 bytes
SHA-256: 7c6e09c6f07862fe828ab3d8521becd3efcaf947a2920b497366cc3c5214bbba
font_03_sfnt_off00011f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F83 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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