Malicious PDF — malware analysis report

Static analysis result for SHA-256 224cf5c0f14cd606…

MALICIOUS

PDF

70.7 KB Created: 2021-03-23 10:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 745a87b077976d3f32cd672a8f174777 SHA-1: 94d6cebb0be4ccfeea0130094ae7ed2c4a8950f1 SHA-256: 224cf5c0f14cd606dd5899ffceb5c9e6f0ab76dc95ba35b09e7e0c0bbb2728a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an external URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate an attempt to use the document as a lure for malicious content.

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://bologen.ru/wix?keyword=explore+learning+cell+division+gizmo+answer+key+pdf PDF link annotation
    • http://laketofetujeso.medianewsonline.com/guide_to_arranging_music.pdfIn PDF document text
    • http://rowedirazizamo.22web.org/jiwopubomugigogajiw.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/formato_acta_constitutiva_sociedad_anonima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_05b6173cd5584e91bf8b95d99b499b13.pdf?index=trueIn PDF document text
    • http://vavadot.onlinewebshop.net/57800932186.pdfIn PDF document text
    • http://bologipegokofi.epizy.com/the_feeling_of_what_happens_download.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/16697504366.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/best_to_word_converter_software.pdfIn PDF document text
    • http://joxumokuri.epizy.com/baby_child_laughing_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/kedivotojevedogagisosev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f5a38a-00d8-4ae0-aa89-09921ec4866d/does_taco_bell_have_low_carb_options.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db7728f-cb35-4a8b-af71-9857c9278e81/69694689972.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_5ecc3c49206d41b8a3b3d1b675e5acd1.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_ed1ee41c81494ffbb35a94bf8fd84fc5.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_7e07bf3bf8f64afab7d2ead1aa0867dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ff2d71-ab8a-44f8-8219-dc9985e18329/37685569743.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/xiwobuxakexisu.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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 5868 bytes
SHA-256: bb93e912f291df5119919c4af121944e2a5d0f5e9ff9a09ad71d3e2791864f91
font_01_sfnt_off0000e6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 11188 bytes
SHA-256: de493f8467416c52e0b3022ed37a0517a23929b85e28e7c144ebf386050d2a8b

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