Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb35eb293de9823f…

MALICIOUS

PDF

84.4 KB Created: 2021-03-25 04:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0d24bfe45b7d8c94267a1e53b8ddf322 SHA-1: c44f07c3cc625f50f360c42c1c17c8b371eb9dee SHA-256: cb35eb293de9823f8c6d0a1fac3106fd6550894bf8151c685d8d6ef952a33d8a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, specifically one pointing to 'druttle.ru', suggests a phishing or content-luring attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to deceive users, potentially leading them to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://druttle.ru/award?keyword=adobe+acrobat+dc+not+opening+pdf+mac PDF link annotation
    • https://cdn.sqhk.co/todiwapubu/hbtHVJJ/28571861822.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/blJhazR/homescapes_app_won_t_load.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/gegARja/fly_this_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/icjjZKF/2045467742.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/kQQ1Vjf/92000281984.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/fKHhehe/9003444100.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://s3.amazonaws.com/woxotopapozokev/how_to_factory_reset_lexmark_e360dn_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/25232105649.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/star_trek_enterprise_archer_and_tpol_fanfiction.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_743ee0c9b6b64b06926f75ba57d0a11e.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_0cac0821c34a4055a8cb2026ba6359c6.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_068c2be5b95246cca57cc7ff5c82310e.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_e46bdb3bbdbf43cc8338e04aa824a9ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resixexi/haier_portable_air_conditioner_manual_hpb08xcm.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/choke_motorcycle_manual.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_e117255b44e44af18774ed37c769c7f8.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_243cbc2c221e401d866065c1264d78fd.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_9753e9a710f543c683bf91b5b2bda69e.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_446fb40a19db46aa9d16a781624e1e40.pdf?index=trueIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_610b9c4d85b64a21bf0b7c8fb0d5048b.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_e89b7017e97946d89dbfdc176dc32f01.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_9b864751c9ea4b5dbec589adf04fc25b.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_d96a642378b048eebabe6c597fc410d5.pdf?index=trueIn 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_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 5180 bytes
SHA-256: b26acc603dd6c975a7cf12ebac17764bdc7c90c83cc0f7a9ae6d716f10fadc3f
font_01_sfnt_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 10732 bytes
SHA-256: 90b3a5acf66c17deb78839599de3758caf05e7eef2cc800adc8afcd980a1df32
font_02_sfnt_off000133d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230