Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a62189522fa7a95…

MALICIOUS

PDF

72.1 KB Created: 2020-12-28 14:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 547cd768e55bd3564dde96a928420a5e SHA-1: 7b1a95235e4f02c783d15d71255366f05f69e8cd SHA-256: 9a62189522fa7a95094a03a9e0a78c7d6803aeda735a2203e4a43e706776ebcf
164 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a link farm with numerous external URIs, including one pointing to 'traffnew.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the 'PDF_SEO_LINK_FARM' heuristic suggest the document is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=tic+tac+toe+glow+hack+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5fb83dcd0da2c.pdfIn PDF document text
    • https://cdn.sqhk.co/gurukemopuge/Pmjhvz1/simple_cake_decorating_techniques.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fc1dcc07ee62.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/1d5a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fc25e62e7c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_5fbf78569b0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5fbd9db2c8e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f8a72d0eee30.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/3026e749-169d-4021-b12f-870224daeb27/the_rose_that_grew_from_concrete_poetry_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a589c419-f7b7-4775-bdab-9d804cf25e4e/danby_premiere_dehumidifier_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b4523d-2ba4-434f-98aa-9aab82833f65/fight_club_bollywood_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5518685-e76b-47a5-b469-6d53702c466d/juegos_de_patinetas.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_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 5028 bytes
SHA-256: 6280c44515a01eeb9119d3e57e3c7140d0b2f0f3e7f009d279398a7a73904bd0
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 14172 bytes
SHA-256: 0bdcf3b6c227ec06c9464958c020a184f97fb27aa05243d16a22b8400dbbad51

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