Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbb81ffb512577b…

MALICIOUS

PDF

70.1 KB Created: 2020-12-30 20:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6bd5c757faf635724ae31be6dd5467f6 SHA-1: 7a70fb5d9c061369c2ef3292f06cc5bfde3013a6 SHA-256: bcbb81ffb512577bb13b92a74a5e1078a5c2a86dcf8dcea72b9f8dd7422b6b56
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, trafffe.ru. While no scripts were explicitly extracted, the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a phishing or malware distribution site, aligning with spearphishing attachment tactics.

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://trafffe.ru/123?utm_term=ricochet+kills+3+y8 PDF link annotation
    • https://cdn.sqhk.co/xelalizogim/QljbhfS/cnc_machine_wood_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/aHic4UK/zevuzupakinogu.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/icehiE0/descargar_oye_cuba_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd25454-1ba2-49d2-bf0a-d766470e09d1/sidadum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bc6672-15c5-4fbb-b3f9-4b6496d38214/fubufifajomabejenisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f68691-c92b-4bf7-8eb5-da063305a17f/25159361284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa718d3-82dc-4b1b-afed-07c6e1fbee68/87278566738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de976910-bb58-4e1a-bd55-31c0615a833d/avrupa_yakasi_86_bolumizletv.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/wuturiligegap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d055d83b-73c8-4308-bc23-fba8ad986bc5/timex_watch_manual_turn_off_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7348e5-cae4-49ef-8a08-0a769eb60d43/things_you_can_do_with_google_home.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/foster_care_in_georgia_fact_sheet_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b45abcb-888f-4424-ac6f-84fc15c438f2/english_file_pre_intermediate_workbook_answer_key.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_off0000bb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3B 8460 bytes
SHA-256: 2fee6b7a670c0a22326deee442b46cf968a543135ddce284bbd79714bfc0b563
font_01_sfnt_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 5112 bytes
SHA-256: 6e821996dd8ca603c226a05e6905301e8735dbd41f2c6735765ce6c0cd8ba6e9
font_02_sfnt_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 9676 bytes
SHA-256: ad68780b30fcb34d2b2e7ae4bbba37dab37cc9b9b7235e8bbb5841c8165f7bc8

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