Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b5d80c5d6d85cd…

MALICIOUS

PDF

65.3 KB Created: 2020-11-18 02:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 47799c3d3015d3329474bde77c6d13d0 SHA-1: b95889222135f85cdfc007b823dfc9d1946c3c5a SHA-256: 73b5d80c5d6d85cd14d07fc4a0a956f23b0e3f002a8098330798d2ccbb524a7e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to 'https://traffset.ru/123?utm_term=vodafone+sure+signal+4g', which is likely a malicious domain used for phishing or to host further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=vodafone+sure+signal+4g PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f8ce4acbc61f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f88b08dc6d49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/67989b1e-0d45-46fa-942b-19f937cc831c/sazan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223291de-da43-4f96-aa74-98064cbe6f5d/85460701623.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/xewiporeluxufatevuxojuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776803e1-c27f-4a1d-b598-3db3bc2cc69c/41573134281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5d752f-c150-451b-9c61-287e03ef305c/40895253202.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/har-ber_high_school_football_springdale_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc016d1-686c-4e6d-855d-a3b6eb59c94c/71537629774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5b275f-f055-4bd9-8bd0-d0ae0a6f3b9e/dixetapuvasutepipa.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/guxixi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/is_square_tube_measured_id_or_od.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506e8b16-65d7-45cc-bd35-f6fa1ff9ded7/58589803367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e52e4a-3f22-407d-90b1-8d581d0ee43a/tuto_demontage_pare_choc_scenic_2.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_off0000b510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB510 4932 bytes
SHA-256: b47a84f62cb0c6e8901f45303cdce2d47c376ff9530aae2150a558dd9f8b0ab1
font_01_sfnt_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 10784 bytes
SHA-256: 6b0fc98703999f55ce6620404f3d9e7e828ede4a8c4a8841230a67840e7a98dd
font_02_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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