Malicious PDF — malware analysis report

Static analysis result for SHA-256 63090c7259214cb7…

MALICIOUS

PDF

71.2 KB Created: 2021-03-12 19:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aedad099fa2d6d7cbbe1f6ffbf556dae SHA-1: 99ad3f39f01b38e3afa772404f58ba5dbdf1c20d SHA-256: 63090c7259214cb7c1c8ba61bea8bd111b39ca84f38c8113395ebb4a0921441b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to instructions, likely a lure to encourage users to click on the malicious links.

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://mezovuduw.ru/aws?utm_term=intermatic+light+timer+instructions+ej500 PDF link annotation
    • http://lojapidabud.mypressonline.com/wabugujizigesebiti.pdfIn PDF document text
    • http://timecodes.net/45600264560ql6s0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_6041daf89432c.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/bipedyoq0u.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/rivigag.pdfIn PDF document text
    • http://gakmancreatures.ru/armonia_cromatica_libroc24sz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_60215d1ab3157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5ff933fd45b7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejemevogoge.myartsonline.com/oreck_xl_air_purifier_parts_list.pdfIn PDF document text
    • http://detapiraxexe.epizy.com/ranger_rci-2950_manual_espaol.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_8e632ecb36c74c378fe69095c8990351.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/1678045001.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_194f0f6eb84c4762bc409ceb249c17b8.pdf?index=trueIn PDF document text
    • http://lijowavatajo.myartsonline.com/how_to_fix_key_that_popped_off_laptop_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/92270362261.pdfIn PDF document text
    • http://wegudewabeko.rf.gd/catalogo_videocitofonia_bticino.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/74060222596.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/15100980016.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/streetcar_named_desire_mitch_and_blanche_scene.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_off0000d867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 5492 bytes
SHA-256: 7c0c49b7eb3de006113339dae3ae0c94c01a2666aee8ed5ad4ff289d887c34cf
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 10764 bytes
SHA-256: 155b145442cf9f49c9b93b24a3b09c73a6e78413a374a18db7499582d34818ff

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