Malicious PDF — malware analysis report

Static analysis result for SHA-256 9debf92df4fd41b2…

MALICIOUS

PDF

78.3 KB Created: 2021-06-05 21:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e44310f8631dc0e0a5a88e707c55164c SHA-1: 5ba66d836722393bae48b8d27c0853ba10c8181c SHA-256: 9debf92df4fd41b21eef0d76e9913d570c7575b9b1c24c9b7c7ad7f20a697750
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to 'Dala'il al-khayrat pdf arabic'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cructi.ru/pbw?utm_term=dala%2527il+al-khayrat+pdf+arabic PDF link annotation
    • https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/gitot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5fc72e1196a11.pdfIn PDF document text
    • https://pixipesigogod.weebly.com/uploads/1/3/4/3/134370637/pexigepopidogiloza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_60415e0e7b59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_603a8c5ccf864.pdfIn PDF document text
    • https://dikubone.weebly.com/uploads/1/3/4/6/134603537/menaxixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393193/normal_5ffd73a8c4e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_60638302be8a9.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/kugizakemexir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413110/normal_5fcc75a59fd5b.pdfIn PDF document text
    • https://tibusikexotojuf.weebly.com/uploads/1/3/4/0/134012355/soxugul.pdfIn PDF document text
    • https://sixupotivene.weebly.com/uploads/1/3/4/3/134305687/7365056.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/mivupodivokisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_6014807ed4718.pdfIn PDF document text
    • https://suziviwibemenaf.weebly.com/uploads/1/3/4/4/134485417/2940120.pdfIn PDF document text
    • https://pudozewo.weebly.com/uploads/1/3/4/3/134311846/0156a6602266.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nilanom.pbworks.com/f/43590226002.pdfIn PDF document text
    • http://vazexetuv.pbworks.com/f/free_download_minutes_of_meeting_template_with_action_items.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/dodudimexoxijajeporaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54437427-4591-41e4-ba93-799d71269500/bejasoriletuloruxigigezu.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144666723/mexedezafoka.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/ac_origins_silica_cheat_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900afc31-a1dd-429a-b343-33861544d711/85362515945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0849b8a4-e1c9-4035-a148-f57c690f1f7a/optical_fiber_communication_book_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 5436 bytes
SHA-256: cfcff9b09266c7b79c5b0f7dd6c160b1ce2102658cecdae984a12cf6f863dc66
font_01_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 11268 bytes
SHA-256: 77b844278818662df4c9bb0cbe7858655cbd47d1813f36ddf1a2941108ac3d60
font_02_sfnt_off00011481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11481 16524 bytes
SHA-256: a6db957cc80304e77b037bd49692653986840566bfb5a6e74c3b41559578c91b

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