Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85c55646c2486b1…

MALICIOUS

PDF

110.0 KB Created: 2021-04-24 22:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993b5c94732296cabb43d1e0b4cc80a2 SHA-1: 24c4705a385320ace1758f1cf5cf6eab09e2908c SHA-256: e85c55646c2486b1e70f31cb23f3a9a0ba0f2c21702677cb6d08aa0ef8ea23a4
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a phishing site, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to educational content. The primary technique observed is the use of a malicious URL within a document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=plan+de+clase+de+lectura+para+primer+grado
    • http://tozokexijuxizis.iblogger.org/jerawuvitate.pdf
    • https://zaxonoso.weebly.com/uploads/1/3/1/3/131381259/tawalew.pdf
    • http://wugumonisukanib.sportsontheweb.net/what_is_wps_pin_for_hp_printer_8710.pdf
    • http://xopoxek.iblogger.org/bizoguguxisazoxajabej.pdf
    • https://cdn.sqhk.co/jolekusij/f3hj6hh/ford_shelby_f150_super_snake_for_sale_canada.pdf
    • https://beponelife.weebly.com/uploads/1/3/1/1/131164358/c31c9134.pdf
    • https://cdn.sqhk.co/ruzemesafe/Iy2idhi/zara_usa_men_s_shirts.pdf
    • http://rotirir.mypressonline.com/sijigebobib.pdf
    • http://nawobutesoparut.iblogger.org/books_on_astrology_for_beginners_in_gujarati.pdf
    • https://cdn.sqhk.co/wigatozaduw/cigihgd/my_events_facebook.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://najekaweza.onlinewebshop.net/vadawevuz.pdf
    • https://s3.amazonaws.com/pibajuwi/vimasonagawirukozuxin.pdf
    • http://sazasewugekupej.onlinewebshop.net/risco_cardiovascular_framingham.pdf
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_196b938e381744e6a8ddd68e34b6a978.pdf?index=true
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_dfb76697f0ab4764b3891fb25bea5602.pdf?index=true
    • http://tuzuxutetug.atwebpages.com/zezapogefekuxuzow.pdf
    • https://s3.amazonaws.com/gapuruxumeg/17029898386.pdf
    • http://fazafof.rf.gd/black_s_law_dictionary_7th_edition.pdf
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_ac4d72f9478346eb8b902bb0e0e271d4.pdf?index=true
    • https://s3.amazonaws.com/wupuxus/notugubofupazosetubu.pdf
    • 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_off00016f2d.bin
333cda0212cef27ebb6704550b95511544be1be97d19f4a06fe9c1dfcace493f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F2D 5392 bytes
font_01_sfnt_off00018172.bin
afbfb5947b4412675c9ae2b27c4c6dd88c98712335606d89a8f092fda3ebd152
pdf-font-stream PDF embedded font (sfnt) at offset 0x18172 12924 bytes