Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8142e8a9e8d2e86…

MALICIOUS

PDF

71.4 KB Created: 2021-04-03 12:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 38ff1fd7ac47f9cc3779a09987942594 SHA-1: 74353f8c7d0212dd1f1c3dc693c00922becc72d3 SHA-256: e8142e8a9e8d2e869d5321b62fcea0ac30be6fd59b0f61e7b6960c6456fe6336
116 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an embedded URL pointing to 'botokaw.ru' suggests a phishing or malware distribution attempt. While the document body is heavily obfuscated, the overall context points to a lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://botokaw.ru/wix?keyword=super+teacher+worksheets+long+division PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370076/normal_60460fb608b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_6049d1a1764b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60262471d7475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fcceff592b3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5fff3f5d01e9a.pdfIn PDF document text
    • http://mnogoturov.com/misuzunomejixusak5z7p.pdfIn PDF document text
    • http://bravos-kids.ru/tinugozos005bu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366664/normal_5feb466ca77ec.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/vibuvomomuv/34156594408.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/gawugetigok.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/mekozizajilonedisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095f5397-0525-4b83-9016-f2730d8c5d4f/53030480432.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/how_much_is_ddp_yoga.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/how_to_use_colored_pencils_like_a_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/branding_corporate_identity_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/my_bot_clash_of_clans_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/sheet_deleterow_app_script.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/asus_rt-n12_d1_wireless-n_router_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a7af28-78da-4316-8cff-3b9da6e538ee/will_the_us_abolish_the_death_penalty.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_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 5656 bytes
SHA-256: a7c06ddd94945856658d4eb863f5bccec03384afb25c0c1c5090570876db0c1f
font_01_sfnt_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 11136 bytes
SHA-256: 03d352443f00dfcfcbc0af02568050b066c076429c1bece69651883ba9c866ee

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