Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02dab9fcfb1f28c…

MALICIOUS

PDF

73.2 KB Created: 2021-04-27 17:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 68a31a4ef6b19ecba07358d4d24d16db SHA-1: 86ed97a79596e9e1443a6dc6873a8628e436185b SHA-256: d02dab9fcfb1f28c76826a973812f6d9883e5d1cdd87172dd3f3d0c8e7e1fd9e
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to unlocking a microwave, directing users to a suspicious URL. The presence of multiple external URIs and link farm heuristics further supports a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+unlock+panasonic+inverter+microwave+child+lock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fc6d2289b4c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5ff6bf16ed6f4.pdfIn PDF document text
    • http://fanewixijek.22web.org/rijemafijokixesabunojat.pdfIn PDF document text
    • http://zewarog.22web.org/86637194411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_601b04c1b80ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_602878468fb85.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/64571001886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufijuwodep.epizy.com/situpoluxanavoluk.pdfIn PDF document text
    • http://kenavegolixase.epizy.com/antologia_de_cuentos_honduras.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/send_email_in_html_format_outlook.pdfIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_be471a8a20eb4aa5867bb7eb1fa32848.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40758e11-f400-4518-b219-0d8ff6dc0f4e/punosilaniverojegeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d5c1eb-233a-42db-9576-cf4bfb779462/javebojiluki.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_7418b616368441b39f47571f5ee7d65d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/655ca64f-0fe0-4524-b62e-6c8afa61f21b/is_gluten_free_okay_for_diabetics.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/86063819947.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/strawberry_dna_extraction_lab_report_introduction.pdfIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_503d5808db9947ff9cf5d6612faa6ad6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 5492 bytes
SHA-256: 3aa1d69c9d4800727ddb83d4b59ebe4c53c54f19679b19c45cb4c6c5aa43a05b
font_01_sfnt_off0000f28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 10848 bytes
SHA-256: bb7dae5309208b84f5c2cdde39d4de3d0cc23db9a014c0509807a7bf654fa4eb

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