Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb15afa991cc0ec6…

MALICIOUS

PDF

70.0 KB Created: 2020-12-21 18:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f5f0498b1a51e58ebc4fccc27462a386 SHA-1: 98ef7ab4d5c15a0e20165df5a2d56cd28b9d7d42 SHA-256: eb15afa991cc0ec6b116678f7c364c94ac4960876ff7b781f9dd9a3c9c7d0ed7
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-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://trafffi.ru/strik?utm_term=how+long+does+gunshot+residue+stay+on+hands PDF link annotation
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/0a332aa248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85a9b8c-6e47-4e5f-afe8-7274e3f1df8f/rockfish_hoke_elementary_school_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad671cba-0a26-4d41-8d1b-e57ee9286be5/motorola_nfl_headset.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ba1a87939686422cdfb/t/5fc54adb6457125654ea83d8/1606765276669/autodesk_inventor_cost_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/dodosijakeforelikozebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6dd2ee5-5494-4571-8c67-30813d79336d/54512620280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945b1a65-9a56-4c0f-b232-a4e850a31103/jezagifok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde89c80172f85bb329d465/t/5fdf75dd15a11837d0ba5978/1608480231998/brittle_deformation_is_generally_seen_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb6299a-c45a-4753-81f6-568edca7df6b/78273844621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f2fc48-ec28-462d-a04e-7deb312c87b3/the_body_and_the_reproduction_of_femininity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc82f6f-ede9-4574-a914-278b610c61c2/kurowodatozatoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33dae3c3-4e0f-4f83-8378-0cf7fa934beb/29702758673.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_off0000bd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3C 5240 bytes
SHA-256: 0435fca2cb07ca977edc231d0ef7c39519bc2252a62ebdb31f7eb7607aac7e7f
font_01_sfnt_off0000cf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF22 10852 bytes
SHA-256: f3b444968962c70fe39f8e3974f9e0f9a30f42d662ba365b72c1c048ebc85f4d
font_02_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 16060 bytes
SHA-256: 1a51fac5cecc05d5f0a5d3b698ffe240ccab470cdba6a823ba27c6c2a12c20dd

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