Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e9a01fe2357a65…

MALICIOUS

PDF

94.6 KB Created: 2021-04-08 03:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c1a714520e44ad12aea44db6f7ca775e SHA-1: 04b550268f82266777be1170ef413e5a8912b267 SHA-256: 33e9a01fe2357a6592f0b0a096983e0de5f7e72e7e5f23b3f95bda40cc67214a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a book title, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=how+does+the+book+night+end PDF link annotation
    • http://bafedudovodamo.medianewsonline.com/algebra_1_quadratic_equations_test.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/XfuwihL/lock_screen_orientation_ipad_mini.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/csq0spo/98269706445.pdfIn PDF document text
    • http://tituguzedilewo.22web.org/broken_vessels_key_of_g.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/gecjXih/58692054986.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/simile_and_metaphor_worksheet_4th_grade.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/xotuwelit.pdfIn PDF document text
    • http://xivoxuvawet.iblogger.org/whirlpool_gas_range_parts_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fopavege/jdjchji/brave_frontier_characters_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jikopot/98290141650.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/difference_between_contract_and_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/head_to_tail_vector_addition_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/how_to_do_a_mind_map_for_revision.pdfIn PDF document text
    • http://viduzakovovamu.rf.gd/18197537933.pdfIn PDF document text
    • http://vomifavub.epizy.com/36633257765.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/butiwozexadajotejelu.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/81529522817.pdfIn PDF document text
    • http://gezixerigalejeb.rf.gd/sulumebuzoxabepakof.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/paboxuvudajozakilukov.pdfIn PDF document text
    • http://mugijuzes.epizy.com/43914841319.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/checkbox_color_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/88438244335.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/guworasuvufedilavidiwaji.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_off000136f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F1 5004 bytes
SHA-256: dc2c1ad4f916f5204b4f1010454d73754f692aed26a2492a81d990a457b596d7
font_01_sfnt_off0001480a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480A 11044 bytes
SHA-256: 3250451ef9e7c994ea05f938c3a032b0a2217413a6d8c9568325b397da9c1f1b

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