Malicious PDF — malware analysis report

Static analysis result for SHA-256 e742953724e775b2…

MALICIOUS

PDF

83.8 KB Created: 2021-03-07 13:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1252600859cfbb8fa07bd30d5760b1bf SHA-1: bdcc5bb82beb1226fadef2104b098df94e841570 SHA-256: e742953724e775b26e067d0d006a254b4b14c04060ff7cdd1efae5ef8c43250a
186 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 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=herf+a+dor+replacement+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5fee451dd07c8.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/dCieieH/classic_bubble_shooter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_5fd87a0ce9418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_602cee5b5052f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5fca11d511c31.pdfIn PDF document text
    • http://gisonanezoboru.iblogger.org/juledo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365620/normal_5feb8a18c0b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_6010fcc7901fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd0fe8d9bc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd5efdf77d6f.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/gcjh6hj/crossy_road_game_download_for_pc.pdfIn PDF document text
    • http://forezakineru.iblogger.org/92155442462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_fd33fb10adb14f25b7838d42adeac4eb.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_39f76e1590a247ad91258fac7209e5d1.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_2fed202c36064ec5889cb848cc8e8178.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_7e36fcff42014a27bbeac5f513ee9882.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_451620d61d5a4dc6b635fd509a889437.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_a5cfe379c19e49158284e2583f83261e.pdf?index=trueIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_521f9a449ad44b3d8e120de5d1064602.pdf?index=trueIn 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_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 5260 bytes
SHA-256: 6b74e0f435cf01c7103a728b701210c70da408251e87df9b037c2d4d3764053a
font_01_sfnt_off00011864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11864 13032 bytes
SHA-256: 54b3bf81ae6042cb6754592b8a44b505ef71bdd485050c57349831942a2cae32

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