Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe2007c7a7fab67…

MALICIOUS

PDF

79.6 KB Created: 2021-03-19 00:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6b76190a1d80a418d1489d23ee32a731 SHA-1: ad28e40a8c17a4ce1cb05464e797de0bcd0dc703 SHA-256: 2fe2007c7a7fab670527d02e61d3fff986b6d35b18d82e926331ddcca5c461c1
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. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure for 'Osha safety manual free download', which is a common tactic to entice users to click on 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://xezojetit.ru/strik?utm_term=osha+safety+manual+free+download PDF link annotation
    • http://nofawemew.iblogger.org/fisiopatologia_absceso_heptico.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/VjaoFhd/zenubuniririgafofasanapi.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jiE6Cpc/ferit.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/zuxojij.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/craftsman_113_table_saw_fence_upgrade.pdfIn PDF document text
    • http://zuwitirub.iblogger.org/fipegubak.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/Dhghd6v/malmesbury_school_sixth_form_open_evening.pdfIn PDF document text
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/tosakujaxo.pdfIn PDF document text
    • https://somubafe.weebly.com/uploads/1/3/4/4/134444697/kedidavidalereb.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/jegiwiru.pdfIn PDF document text
    • http://zugamumenune.22web.org/catalytic_antibodies.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/juzej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_3920c32128e6448e982c642308b0a775.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_90804e39b42b4f6cb47a30133dd2b89e.pdf?index=trueIn PDF document text
    • http://jeximojela.myartsonline.com/air-lap1142n-a-k9_factory_reset.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/10354044083.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 5204 bytes
SHA-256: 13ce7a1eedef7f808cc2380aeb74d1f474e933ec33e54997d6f9a06d04466211
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10056 bytes
SHA-256: aa1fc46a941dfea9624771f711b203feba9fa3ae817a60d626475ec44453d1a6
font_02_sfnt_off000122a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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