Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ece6de8b49d931…

MALICIOUS

PDF

79.8 KB Created: 2021-05-19 23:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9c24af301cfe141e24da768c6b50853b SHA-1: 5676f79dc917da90c69b6f7edd43630c50e9c3e3 SHA-256: 84ece6de8b49d9311d4cd7135d3f4a164bbe14d8a353f9e04b5aa14ace0bf24a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=download+spotify+songs+free+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411270/normal_5fdcdd23d8e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_60156236a9232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5fd8da4fe93ce.pdfIn PDF document text
    • https://soxopumejujaru.weebly.com/uploads/1/3/4/1/134108815/6e667be095907f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416796/normal_6007c769e1e72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fce9d2473aea.pdfIn PDF document text
    • https://zefuduxob.weebly.com/uploads/1/3/4/8/134895043/7129008.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/62a8d339-6491-4c79-a47e-4652098ba0b6/47758024349.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/bojipasutatolimorukejo.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/44110259879.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/16872446870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15359797-62d8-45ce-992c-682a58d46576/what_does_the_color_green_mean_psychologically.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/yaesu_ft-450d_pcc_software_control_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00911ef-2274-487f-94c6-88f3143d181f/xafoliwelebafirizala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15a36c4-76a4-461d-bfd4-74b151acb686/65628564923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667371b0-ad67-44a5-80d3-02aab79b935e/theory_of_justice_john_rawls_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bedol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1014e6c-e3d3-4c25-a977-ccecaaf5dd67/roland_xp-80_price_philippines.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_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 5192 bytes
SHA-256: 74fca0f4cb648a7e2fa13d5d04f97e19ecfb6cb3154d539d10fba6681731aaa7
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 11360 bytes
SHA-256: a84dd4d7d8106d168d9776abe02728a9831978f9722d6f169c728ca0396953e5
font_02_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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