Malicious PDF — malware analysis report

Static analysis result for SHA-256 b815710d3c0e2570…

MALICIOUS

PDF

58.7 KB Created: 2020-12-16 00:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d70e648be45b553a1040a5e2fc18b856 SHA-1: 9c8fd416fc14aa3df59df5d41e74be945197f5a0 SHA-256: b815710d3c0e25704cf8792947e99d13017747efbe57ee122211e7fe737923af
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 0.9996

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://trafficel.ru/strik?utm_term=round+table+clubhouse+auburn PDF link annotation
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/c3d2ea263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_5fa91de056455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5f9c8ba20e06c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5fab92135f89c.pdfIn PDF document text
    • https://mebenemezozu.weebly.com/uploads/1/3/4/6/134689881/juzusatifovodu.pdfIn PDF document text
    • https://joxorarosod.weebly.com/uploads/1/3/3/9/133999743/beferuz.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/webipejonavuv/71131622535.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/miami_dade_college_map_of_kendall_campus.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/5546180777.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/25288950982.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/brighton_secondary_school_uniform_second_hand.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fc29e5ee6d49a06bbe86612/1606590048594/plumbing_riser_diagram.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf6bc3c6ccf69f3242fb6/1606284990345/92899195082.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 8

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_off0000aa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3F 5176 bytes
SHA-256: e25f68cbc22f4029a69ca306d0d6ffcbf73c7787c0201c012ce8b453f09475d1
font_01_sfnt_off0000bbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCB 9608 bytes
SHA-256: 18f95db67786346204c27ff605fa613f4fadf694ff031f1ef3a8d61146f7881f

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