Malicious PDF — malware analysis report

Static analysis result for SHA-256 1256e9f5df3b37ba…

MALICIOUS

PDF

76.4 KB Created: 2020-11-25 15:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0832fd75d821ff5a5558a4a2d4286006 SHA-1: 7f6dcdccfd74a2103e6a04b87446a94fc7f230ac SHA-256: 1256e9f5df3b37ba6ec07db5e762071d47ce2eac25783a07aa0166aaf3de6de3
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to host or redirect to a malicious payload. The presence of a 'download button' heuristic suggests a lure to trick the user into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=bibb+county+ga+police+reports PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fa1f2c3a5305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5fac18f25b8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fb92bf353709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8743e3591d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f9bee17d172b.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/poresi/is_is_not_analysis_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063ce85a-0735-4043-9b18-d23e0860418c/jimexibexatige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ec2fca-5908-4550-bcde-d10ea3b40501/67304497977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62dacc16-62a7-48d4-bff3-2362d7bdb0da/chromatography_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/lepuvirukawisexalejexok.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/bootstrap_form_template_with_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/free_gift_card_codes_no_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a13ac62-a871-4db6-8e29-ab32020f8f2c/zupimujalom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb270c05-971b-4d89-b8fd-797c7e94ef05/level_1_sommelier_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bible_stories_in_telugu_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 5392 bytes
SHA-256: 64581442347cbe2a7f33b64720f904195365c4d3543b6195779766b40645ca16
font_01_sfnt_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 11760 bytes
SHA-256: d46192e0b9bda79a294cb7a5ef1f6387d827715a780068a3a04bc692e6a8d573
font_02_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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