Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4b00df434f8829…

MALICIOUS

PDF

225.2 KB Created: 2021-03-31 12:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3f2a54efb584b0767235d4638c45fa09 SHA-1: b4362b94e81bd591cdf0ad752bdd180c2721e259 SHA-256: 6d4b00df434f8829524948c62c24e3f77d1048ae5ab9c4a3bded82d50f018cd2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely a malicious domain used for phishing or distributing further malware. The document body, though heavily obfuscated, appears to be a lure related to a '3d pdf to step converter online free'. No scripts were extracted, but the presence of external URIs and the malware detection strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9843

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://mezovuduw.ru/award?keyword=3d+pdf+to+step+converter+online+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426062/normal_5fee831c34c9f.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/2jhiceP/homescapes_game_level_28.pdfIn PDF document text
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/fakal.pdfIn PDF document text
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/4317242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5ff3c8ba57777.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/dro7iiW/color_by_number._pixel_art.pdfIn PDF document text
    • https://lanedipeluta.weebly.com/uploads/1/3/4/6/134666686/xulikopuw_tisajenexi.pdfIn PDF document text
    • http://shishkin-seed.xyz/rupuzemagowoxunumalinara0u7g7.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/hejj4rP/66535734210.pdfIn PDF document text
    • https://cdn.sqhk.co/fupetabuwuf/ixtMge0/50799114467.pdfIn PDF document text
    • http://alluniversity.fun/834202319197esn.pdfIn PDF document text
    • http://recepty-dd.info/how_long_does_it_take_for_fortnite_to_download_on_a_wireless_connectionv1up1.pdfIn PDF document text
    • http://merovew.xyz/easy_country_songs_to_play_on_guitar_for_beginnershl4p4.pdfIn PDF document text
    • https://solujokorox.weebly.com/uploads/1/3/4/1/134108712/33f64.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/xabapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_6051ca9f9ae83.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/bgjqihC/moksha_meaning_in_hinduism.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/035de109-85cf-48b4-9bb2-2913bb112a83/compare_and_contrast_essay_introduction_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066f7aae-b532-4b04-866f-f5e147b26771/structure_of_dna_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/87348727256.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/99496532903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b42d69c-9d31-4be9-8225-2a1fc9175bef/ford_mustang_gt500_super_snake_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6151e78-2ef7-46f8-a78d-5a38977340dd/how_to_read_choicemmed_fingertip_pulse_oximeter.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/powopesulujizogepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898446d8-3735-496f-8193-ac2c45ac4a55/japanese_sword_fighting_styles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6B 5068 bytes
SHA-256: 6b9fd7448549d395f694b81fb08674e19cde41a2d514688e41cfdd9df40ad9af
font_01_sfnt_off000330c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330C8 14544 bytes
SHA-256: 9270ff939ceda46a5bd019e5592cf40f0299b124b56bec168c5aef761ffddfdb
font_02_sfnt_off0003602a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3602A 16336 bytes
SHA-256: 4b77c449d2441905ba2d6e4a47bca585290be60e322dd663b8ee7a5b253e000d

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