Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6485f0721da5d0b…

MALICIOUS

PDF

168.3 KB Created: 2021-03-14 09:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c12605e1cc65cd223dcd4ca47e0fbd3 SHA-1: b1749cfc92d4791505bfa2a350985cae37a8dcec SHA-256: d6485f0721da5d0b48be7ea8f1e6d7e654c549b97f0b52fdeb0f28dc5133647f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jacksth.ru/strik?utm_term=the+lorax+book+illustrator', suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=the+lorax+book+illustrator
    • https://cdn.sqhk.co/wejideduv/CjihhgV/xasetozuduwamamow.pdf
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fcfebdc8b82e.pdf
    • https://cdn.sqhk.co/sabimejuka/Hulhfjc/co_parenting_schedule_template.pdf
    • https://cdn.sqhk.co/wadusazilox/Aihih2s/tractor_pulls_in_missouri_2020.pdf
    • https://cdn.sqhk.co/tokofape/hjgdkse/87106313760.pdf
    • https://cdn.sqhk.co/xurazegoba/xdIjeKT/8466165821.pdf
    • https://cdn.sqhk.co/libuzewis/dljdbKN/vofetelogedajupaz.pdf
    • https://cdn.sqhk.co/josedinis/1Njden3/69393889510.pdf
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fcf938b44a18.pdf
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5fd7c08226246.pdf
    • https://cdn.sqhk.co/fidakasari/njiq0ii/19409391104.pdf
    • https://cdn.sqhk.co/kikepedu/ijQd9ie/73964485867.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lekezaru/batman_the_long_halloween_movie.pdf
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_51e319d392d54119870d111c86313e46.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dd7a94bf-6435-466a-981f-c3f54503f005/what_is_sociology_definition.pdf
    • https://uploads.strikinglycdn.com/files/4a0ebbd3-1701-439b-bd4a-a4bd8658201a/from_the_mixed_up_files_of_mrs_basil_movie_1995.pdf
    • https://s3.amazonaws.com/rawesaragegugar/guidewire_partner_connect_logo.pdf
    • https://uploads.strikinglycdn.com/files/e2c5c9b1-6bed-4578-a784-a9a2bed326c2/perdona_si_te_llamo_amor_pelicula_completa_en_espaol_descargar_gratis.pdf
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_5ce0ebf888334804b4a3d8b0b63c6838.pdf?index=true
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_34efa1669e294ad9a8aefff6d6de2b7b.pdf?index=true
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_dd8cc0c2ddb24487bc28020fdd9e757e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025546.bin
af4d23c99e253b84cd7d40985f0921a85e62091adb162514e08af30c896f6765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25546 4996 bytes
font_01_sfnt_off00026639.bin
3dbded3bd9b46967a21dce2db91bea972a30d382c63542276d392bccd949a741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26639 13216 bytes

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