Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef94b05319a54ed…

MALICIOUS

PDF

83.8 KB Created: 2021-03-14 08:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c0bbd485bc5c0aa5dd1579ee0926f077 SHA-1: 2ab2bf28e905ed9ebe660f0e0827c6fe09955d7b SHA-256: 6ef94b05319a54ed9ad1e731b36852f54b0eceabe8974a5d721f3b0ab6bfa97b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with numerous embedded URLs. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'dometic coolers', likely a lure to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://fokemale.ru/strik?utm_term=where+are+dometic+coolers+made PDF link annotation
    • http://jakiduve.scienceontheweb.net/wotudirigasipixoviz.pdfIn PDF document text
    • http://tertov.xyz/64588944952lypky.pdfIn PDF document text
    • http://wisujaf.iblogger.org/kekote.pdfIn PDF document text
    • http://osmosiotzs.fun/hungry_shark_evolution_dinheiro_infinito_apkw0wwv.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokiwil/Ggejj9D/74734702007.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/ieCxeRV/nidufomasavibakanaxamavap.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/libro_poder_de_orar_de_madrugada.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/he5hihf/pigexuju.pdfIn PDF document text
    • http://znakomstva69.space/362642522734jii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_4a6efe90038a465382ec545926e2f96c.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_bcc27f5e60f44d578c3e833272010c18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22d593f-d8ab-4574-b8a6-ab1ec36ab05e/area_of_similar_figures_worksheet.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_5d04840e92434825bbe0265c31f6c055.pdf?index=trueIn PDF document text
    • http://pelewonaxiguso.epizy.com/jibukatonetiporovimeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e4be61-722c-4588-a6e8-3991b8931d89/joreganisojuj.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_64b2dd33e43140679f22538d52816625.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_fff6dac31d204417ad51f27f0c162db2.pdf?index=trueIn PDF document text
    • http://zasegusof.epizy.com/zujimebizazas.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/dozikabofinosepajizaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91f4cbb-ab20-4b75-bc90-33d995062a01/esv_single_column_journaling_bible_large_print_review.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_off00010c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3A 5192 bytes
SHA-256: ecc1d2e17dd052469787fb1d3ed0c82235c725c90029c3bd2369ec4525132008
font_01_sfnt_off00011dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC5 10884 bytes
SHA-256: c4b96c4a85acfc37e74f13fc882eb0d7cc1ba990ed13e18ecbd8bd5493c095c6

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