Malicious PDF — malware analysis report

Static analysis result for SHA-256 feeaa6eb7f6c63ae…

MALICIOUS

PDF

116.3 KB Created: 2020-12-01 12:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a0cf4eb7598ac056fe31c7beb8be3711 SHA-1: b70c55fa803c146c8207490fbccb6fefb3724247 SHA-256: feeaa6eb7f6c63ae9060df622b308da00c38201cc820d3d034edac51382ec781
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, including a link farm, suggesting an attempt to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to be related to a quiz, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=picture+logo+quiz+answers+level+37 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420244/normal_5faa2d563ac14.pdfIn PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/6718547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_5fbc2a50bbf3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5faa8611d171f.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/2d6ea59d-7b24-4253-a8c5-1e2dcb55f39d/punuludodelujalawisufedit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce8d5a51-de63-4109-8d4a-647f4767466d/9._sC4B1nC4B1f_fizik_dayanC4B1klC4B1lC4B1k_sorularC4B1_ve_C3A7C3B6zC3BCmleri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc122fc9d79364840b600ae/1606492926248/tang_dynasty_traditional_clothing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775ab9c5-a09b-4da9-a7db-dcf75a52e79a/terituxisipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bf2f29-5a36-4595-aeff-11dad176636e/90882770437.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8b664be903ae63ff416/1606219959299/lane_tech_chicago_staff.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110906609fd0ee7923de0/t/5fc1821feaf37e3b64d57880/1606517279647/52664818332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05ec26e-4999-4a22-950b-ffee72fec234/vigikimerelulenelejaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83aabed8-2d9c-4753-9d61-7e62601dd7dd/woguvulefav.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_off00017f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F9D 5540 bytes
SHA-256: fce32ecd81f6b44b9c2dfe1e3d2e1f45ed6d25098f7dc053e22b1b9a32b03f1b
font_01_sfnt_off000192b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192B0 16192 bytes
SHA-256: f4bc7fafd28ec14558fb136a9a654fb59a16ef0b0878c1e32473d174a1be4f4a

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