Malicious PDF — malware analysis report

Static analysis result for SHA-256 20522381bc105d53…

MALICIOUS

PDF

69.2 KB Created: 2021-03-21 04:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 79af2c5b28fcca2d51b793443c085f14 SHA-1: d1be5046a52a0f74bb57ef569ea25040b64de3ca SHA-256: 20522381bc105d5312904c1790c6704156ccc0b434c6a4f4dae0f79fa14dd0f6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, 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 document body, though heavily obfuscated, suggests a lure related to clothing patterns, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=model+blouse+cutting+and+stitching PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385850/normal_60568c7cbbc02.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/tChg6ii/heart_gold_ring_pandora.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/4ighehd/3238481081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60165c4f86e43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470843/normal_5fdf4f2b44a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_604ab79ea5027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5fff9d1eb2c8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373248/normal_5fccd1ff34b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5fdc082f7a0f6.pdfIn PDF document text
    • https://cdn.sqhk.co/vekazedivipi/ihNgihb/bounce_ball_crush_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472200/normal_5ff06e82dd441.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/android_studio_module_library.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/zorezapulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368485/normal_6004a785eb525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_5fe9f54c891e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_60201465e3c18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406776/normal_6000e7c26b0c7.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/xomepixo/integral_calculus_feliciano_and_uy.pdfIn PDF document text
    • http://xofogijatoli.epizy.com/thesis_presentation_format_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/pabobetokuwanolameparubaf.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/definition_seasonal_produce.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/nuwaneregoxemuzonasebejij.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/genemoteze.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_off0000d151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD151 5252 bytes
SHA-256: 4123eb432b84f73d673317b934fe763f8467dbd6c02b2c8704739cf07f5877a6
font_01_sfnt_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 10604 bytes
SHA-256: 2b33c9aeb693fb3d77238e48c6891d2c49165c07a74e45b14e644281a395e11f

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