Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cc093043802c14…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 11:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb847cd7bb09719593302a89560e55d SHA-1: 2fd17c8df816e1feca11e10f2d75f927d4bf5a21 SHA-256: 43cc093043802c143b0f3b91e8425dd3286acf38b6abfcd096cb3baacf70594c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. It contains an embedded URI pointing to 'vilenefex.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'old soul music free', aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=old+soul+music++free
    • http://sis-paypal.com/barcode_generator_software_free_with_crackti8og.pdf
    • http://tufofol.medianewsonline.com/el_nombre_del_viento_3_fecha.pdf
    • http://degujub.iblogger.org/a_speakers_guidebook_text_and_reference_6th_edition.pdf
    • http://dunodipike.sportsontheweb.net/cambodian_alphabet.pdf
    • http://finipupote.mywebcommunity.org/yiruma_piano_sheet_music_book.pdf
    • http://zebrait.fun/22504072398kzx3e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/genijusemu/panasonic_phone_battery_hhr-p105.pdf
    • https://s3.amazonaws.com/jujojomojemiz/factoring_polynomials_using_algebra_tiles_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/45c83f5e-ac1c-49c5-89c2-0372466bdf0b/runaway_alice_munro_quotes.pdf
    • https://s3.amazonaws.com/zuguvoxoki/what_are_the_goals_of_punishment_sentencing.pdf
    • https://uploads.strikinglycdn.com/files/bf4614e6-e7cd-4ee4-9900-b3bc8ecb0e6d/rekib.pdf
    • https://uploads.strikinglycdn.com/files/16645cbe-f799-41c8-95e5-95dbe81fc9d5/when_you_hate_being_the_center_of_attention.pdf
    • http://rinejifivazori.epizy.com/62766013473.pdf
    • https://s3.amazonaws.com/pafexegud/99131396868.pdf
    • https://s3.amazonaws.com/wupuxus/tone_poem_definition_art.pdf
    • https://s3.amazonaws.com/silubebebefuju/jigajofirefogevuziguvove.pdf
    • http://lamekukibudinos.epizy.com/executive_summary_quarterly_report_example.pdf
    • https://s3.amazonaws.com/juzewojavomofew/38184899748.pdf
    • https://s3.amazonaws.com/lovomijelun/bmw_bike_photo_hd.pdf
    • http://jeloneliva.epizy.com/bomberman_land_touch_2_apk.pdf
    • http://rulamiji.onlinewebshop.net/kuzabedosanetaj.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_off0000f1a1.bin
c3df667cc0f120951d541b4ca9f1a7577ce74f4233e414e1a3995d5d8ae11b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 4984 bytes
font_01_sfnt_off00010281.bin
5adaa5ed0270c4cf26e062690985d2e4b0bce9c8bd094f0f7022efc2d52de7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 11328 bytes