Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6b08a3b70b6b08…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 11:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fdb0ad4d39c86b8c8b1a6f6ccb7ade6b SHA-1: e3ddf7023b13ce6ce36b017f59cc4fe1e44046d2 SHA-256: da6b08a3b70b6b08ac3b83faf13e28afcd48ea0f00e59b151cfe30ea4805a679
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'bologen.ru', which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a pretext related to manuals, aligning with a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=tipos+de+manuales PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369638/normal_5fc86f6a855c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413005/normal_601069c043b71.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/is_no_game_no_life_light_novel_good.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_5fdc2870ed790.pdfIn PDF document text
    • http://trokot-new.online/28707389855biird.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5ff7a0e21c1fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5feb4171ad0f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd77e3462203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405430/normal_5ff5ce3a07394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469836/normal_6001ea1edb059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_603359e4e1682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_60243f5530e9b.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/ven_ven_senor_no_tardes_letra_y_acordes.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/38717254295.pdfIn PDF document text
    • http://future-techno.ru/free_tv_show_ringtones_for_android0vv04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fee9dcdb9116.pdfIn PDF document text
    • http://katipef.medianewsonline.com/fubivuxirozurutogapurorik.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/mefonevimimix/pidopujefibolu.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/school_uniform_images_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/44067079186.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/box_culvert_design_spreadsheet.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_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 4960 bytes
SHA-256: 1a10dbdf89d945f0d1528336650444fdb261c747d89ef915d00eba61ed09fd68
font_01_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 11216 bytes
SHA-256: 886215610c312539cd13a8a5f24b20441bae8f6431de21f56e9be65496943cc9

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