Malicious PDF — malware analysis report

Static analysis result for SHA-256 a293aa36f91b1ae7…

MALICIOUS

PDF

75.9 KB Created: 2021-02-23 20:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aac3dc32fb43fde80ce1cb599c2ae40 SHA-1: 7154995fcf6c1146709e9c5d35eebce537b70ab8 SHA-256: a293aa36f91b1ae7a7e8890dd215c2db5126f74b6e62288c908381fb1790c4c2
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 likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the detection suggest this PDF is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=nyc+community+school+district+5
    • http://lightly.store/bengali_album_songs_2017wpxuy.pdf
    • https://cdn-cms.f-static.net/uploads/4468572/normal_602270a450705.pdf
    • http://clubstore.pro/libasetosokapodaj86aqr.pdf
    • https://cdn-cms.f-static.net/uploads/4476567/normal_600ff6033f2c8.pdf
    • https://cdn.sqhk.co/jemitaso/8cjeXhe/sajixa.pdf
    • http://ukranews.icu/bitigadebefokibekijogigoetgd.pdf
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5ff4be36a4bff.pdf
    • http://ewop.space/likokilaxakofipavobiluze7e03.pdf
    • http://seamanygau.best/moto_z2_360_camera_mod8gpvd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sitok/voriraropiwi.pdf
    • https://s3.amazonaws.com/tigovatolis/59560175944.pdf
    • https://s3.amazonaws.com/wavunot/fusiform_mca_aneurysm_radiology.pdf
    • https://s3.amazonaws.com/bopuxosavubare/45230867182.pdf
    • https://s3.amazonaws.com/sedimeraxufi/school_bully_pc_game_free.pdf
    • https://s3.amazonaws.com/xonaxevetaf/anjathey_tamil_movie_song.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/dalolevidik.pdf
    • https://s3.amazonaws.com/tidigudetefumof/perimeter_of_irregular_polygons_worksheet.pdf
    • https://s3.amazonaws.com/gapivegek/zirorilu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deac.bin
878a3822ea26727a8f8be06fcbf022dbf9b62a83aa1854732c26ee424c12e641
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 4928 bytes
font_01_sfnt_off0000ef42.bin
2708c9391e8d704878ccdc0ab178bc4074c05bcf10e7870151831184c0fa0c97
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10720 bytes
font_02_sfnt_off000113dd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x113DD 4324 bytes