Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe93d2b8d9425113…

MALICIOUS

PDF

78.5 KB Created: 2021-05-11 13:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9c50ce65bfbabf88c0284cfff9633b8a SHA-1: 216bd88178b665db41a19f5f2365efecfe201f58 SHA-256: fe93d2b8d942511311ab7de3edd5446a2c2141975fb4dda06f9f9cb88976fb32
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. It embeds external URIs, with one prominent URL pointing to 'lozipotod.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains a title related to health supplements, likely a lure to entice users to click the embedded link.

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://lozipotod.ru/strik?utm_term=a+partir+de+que+edad+se+puede+tomar+proteinas PDF link annotation
    • http://varistop.site/hp_elitebook_8560w_price_in_kenyar8j5t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_60467a8612730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6034233017c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_605ba98fb786f.pdfIn PDF document text
    • http://armada.technology/pitebja5r5.pdfIn PDF document text
    • http://vegekezivujid.22web.org/el_diccionario_de_armando_hoyos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5ff71b8b34333.pdfIn PDF document text
    • http://raisinshq.pro/jizipebncl0r.pdfIn PDF document text
    • http://molotkov.site/59961112995ovx0c.pdfIn PDF document text
    • http://idclick.cash/mariadb_mysql_manualw5wf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448331/normal_6031cedccd342.pdfIn PDF document text
    • http://wazinufezil.iblogger.org/flounder_gigging_guides_port_aransas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vigevot/86645014438.pdfIn PDF document text
    • http://ratagaze.epizy.com/equivalent_resistance_problems_for_class_12.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_a4b3b916b38d4cfa9027fdce5e0805aa.pdf?index=trueIn PDF document text
    • http://pemeromerap.rf.gd/copper_busbar_calculation.pdfIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_e88c35c778d74e659540bf96d0c95d0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/xibudi.pdfIn PDF document text
    • http://tepobibofa.epizy.com/characteristics_of_a_good_project_manager.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/teaching_vocabulary_for_young_learners.pdfIn PDF document text
    • http://madepuz.epizy.com/91225921904.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_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 5188 bytes
SHA-256: 67c43cfbb8f8b8a62ae3d3af7645a7d50172c800ead76c256969c1fd3c76f564
font_01_sfnt_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 12000 bytes
SHA-256: 3a6fb842b119b2a5349302d24e6208e821b6ebf03cf189372caf67a89cfda96b

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