Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb857b9b0d4ccc6e…

MALICIOUS

PDF

67.7 KB Created: 2020-11-21 22:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 71dc429c5eb42f24135500317fdde230 SHA-1: 845ab5cdfda6754531667a066207145eef6c15a2 SHA-256: bb857b9b0d4ccc6ed4c794201ecfa869462793529f8d327c81caa459eedd4e0c
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and a visual download button. The embedded URL, https://trafffe.ru/aws?utm_term=ap+polycet+hall+ticket+2019, likely serves as a phishing lure or a download source for a secondary payload. The PDF structure and content suggest a phishing attempt disguised as a document related to 'Ap polycet hall ticket 2019'.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=ap+polycet+hall+ticket+2019 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/orem_city_youth_baseball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1b4f3c-828e-4b96-8cd8-a1faac1d802f/wagimumurutenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375ea3dd-5d0b-46c6-8700-563bfdbb7157/kulazolegasit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cddf44d-b7ab-4b8f-bdf2-d583183cf0e3/ark_survival_evolved_nude_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac427838-85cf-4197-8fb9-a970611767f9/70069765115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1ebc6f-9aa3-4021-b3bc-202326946601/vuwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dff015-b3b3-4016-869f-11947c603f55/fejidaxorozunub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31f7b62-f5f0-4a77-b675-8cedbac40eff/beginners_python_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381f4b25-fc73-495d-ac57-1835f1281d22/mt_washington_water_company_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6ba33e-dd9b-4833-ab7e-5babce846936/nanegubozuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a36556-85de-44be-9612-1fc8439ec8a6/50732854883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2138b084-db9a-4bb1-9527-18098fb12bb5/84953727421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b388c636-4ba8-425d-a726-5dabe9c1debd/bozilipolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4863fe-1b84-47bf-b4de-e8d956fffa4c/jebsen_taylor_hand_function_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b460a3a-732d-4781-a73b-5ad07661efb8/score_sheet_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1323ed24-d55e-4f78-a47c-199cade11140/profits_in_the_stock_market_harold_m.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_off0000cb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB53 5384 bytes
SHA-256: 9022c919ad5603adacbc64ad2145b53176ace352c3c26113441f1775db41e6e8
font_01_sfnt_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 10668 bytes
SHA-256: e9b2c25cee6e3a19492408f4c0ee414d0fb0a624ed1c6651cfafd2c80613e027

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