Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79b9a5786184776…

MALICIOUS

PDF

82.3 KB Created: 2020-12-26 18:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 82b064a6dfb87cbfab0276eae7495f6f SHA-1: 0c7cbc66eb2144554d8e185383c59d8cd1eaeb92 SHA-256: f79b9a5786184776ae14df059e5ffa4af2d0f689930aeb50bf587334f1077da2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/aws?utm_term=chess+multiplayer+offline+apk'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=chess+multiplayer+offline+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_5fc08e6761035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_5fc7c45fd4205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_5fcf64a726bcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f9003fb3a25f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5fbd25eede03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_5fbbfee5e8881.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/gifojuxaxeva/nularireduximolozopikegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5c50da-a607-43ca-b4c3-505ca66bb71a/stone_fox_book_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7916d14-4d32-43d8-9a18-b5928ddba5a9/interpersonal_communication_kory_floyd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb459ff8-b1b4-44fe-8ac6-c349861ea649/weruxafutibipobupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8e49cf-80bf-4aeb-aafe-3eeb91279b6b/seginosarodabuleden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322be003-ef5f-46fd-abb9-1aaf92026c95/truck_wallpaper_free_download_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746512aa-7224-423e-a37d-87a702579047/supprimer_anti_demarrage_megane_1_essence.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/connecticut_dmv_permit_test_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b8196c-a020-4df8-a678-f07a4cea99b0/descargar_opera_mini_handler_internet_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 3628 bytes
SHA-256: f5f2ac694a13c929a5cfcc31de01d63edac1bd297e8cd621484de576d3b5ca48
font_01_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 5212 bytes
SHA-256: c997a9d763151c81f0bcf52dbdea43ad0db21e8e6fdcce148abbfc4614a3fddb
font_02_sfnt_off00011200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11200 12876 bytes
SHA-256: bc5e1abaf8d2b8a87dcd7a396a831951cb0acca9fb2acc9815494c82d840678b

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