Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10b7fa029b3098a…

MALICIOUS

PDF

75.8 KB Created: 2021-03-04 23:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ec0d3469f6f18fbf9f9b4b6be7df4eeb SHA-1: dad397513dc6f61ee2132bde0949fa2c6415aff5 SHA-256: d10b7fa029b3098aeba7acdb321c59078effb131fd3a2254f19d9b1e4c2ae2e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it functions as a link farm, directing users to multiple external URLs, one of which is associated with a phishing lure related to fixing a Keurig machine. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://soxebez.ru/123?utm_term=how+to+fix+a+blocked+keurig PDF link annotation
    • https://cdn.sqhk.co/mukutosi/uRsjc9a/sakidebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd12a0be58d6.pdfIn PDF document text
    • http://wevepizivato.22web.org/zezus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481069/normal_600919229da41.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/f5BLgdw/8362425950.pdfIn PDF document text
    • http://xigobaxubegozuv.22web.org/smoking_girl_hd_wallpaper.pdfIn PDF document text
    • http://vanorokadojigi.iblogger.org/water_drop_bump_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_6007edd14e3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_6029dd268bb40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450355/normal_5ff664c8a0253.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Fviifgh/22666657883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5ffa1198e3951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444648/normal_5fdeb5390c8b6.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/be3e63a9-4213-4911-b726-eff6215e28ad/is_the_green_mile_a_book.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_bd0a4d916c5542ea98e31f52518da790.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_af1775f6995146e88870d5db3775991a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71096520-7688-4f7c-96c7-37f1496246f5/how_many_years_should_a_central_heating_boiler_last.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_9d918d7a6c1b479487269d3e8b85906a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ebcac6-81e0-411c-a67f-15a04fa2ca59/64495221121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f857d2bf-4522-4627-ae7d-ff65e5aecf59/44397674509.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 5336 bytes
SHA-256: 099d7b5af9b66944acbc43ce3a3733c84dbe55a5f13c862f1e5d32261cd49b9e
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 10012 bytes
SHA-256: 34619c46990e6d9a74af24eff06b739816681386030fcd4972e765d76d7ebf65

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