Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5116f20292239f7…

MALICIOUS

PDF

105.3 KB Created: 2021-03-31 00:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4eac395de9eb1ca4e73d5e2c2e606448 SHA-1: f11f036df0b0bb1f3abecf4de36872f8720d12bc SHA-256: d5116f20292239f73147abc071186845de87a07b1f43d066471b90bc81470718
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL, and ClamAV detection confirms it as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to an 'award' or 'definition', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=poultry+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/lofesaxudiwo/iehbfHp/light_up_middletown_middletown_oh_45042.pdfIn PDF document text
    • https://cdn.sqhk.co/jowepotoxum/NZihcgi/sidafezotefudawawuvadavuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_6010c6cdefa4a.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/hjhgdgc/hmrc_self_assessment_registration_deadline.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/oLhdhjj/adding_improper_fractions_with_different_denominators_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/gdUfEl3/new_york_times_crossword_puzzle_dictionary_large_print.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Qhcic1Z/inside_out_chords_and_lyrics_eve_6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/jeigKjh/play_4_numbers_ct.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/idjijcA/war_of_the_worlds_1953_blu_ray_review.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jxargdJ/best_free_video_player_for_android_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_6017323e554dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gawekavadave.epizy.com/85388674487.pdfIn PDF document text
    • http://petodugutiz.epizy.com/teacher_aptitude_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/cancer_immunotherapy_comes_of_age.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/wotijasigepezosobe.pdfIn PDF document text
    • http://fexizabo.rf.gd/rudogapurepog.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/52174033987.pdfIn PDF document text
    • http://pixotet.epizy.com/how_to_update_hs_mini_maxx.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/59010400666.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C31 5920 bytes
SHA-256: d51152e5cbcf7fcbf8cb13b86c390698df0a3e9154eb6780a4512b54ee4986c2
font_01_sfnt_off0001604d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604D 4752 bytes
SHA-256: 25248006c1c2d515c0c2ce84cb523a6e415b0947c03692fcfd8553363c9921e6
font_02_sfnt_off00017094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17094 11640 bytes
SHA-256: c3bbdeb134abf51a5e3477a442724087f699e5aa0e45842a96ecace2c1e759a5

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