Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e795b01e541a932…

MALICIOUS

PDF

60.4 KB Created: 2020-11-25 23:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb7d4b3caf1eac905400a6872dc804f4 SHA-1: 2ae044fadbbff5e4e237577a712bf515ec826dff SHA-256: 3e795b01e541a932b8b89015c5654af529dc16b5a6d0426a9683627ec9708653
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple links to redirector infrastructure, specifically identified as a malicious redirector and an SEO link farm. The primary malicious URL, 'https://cctraff.ru/strik?utm_term=monster+park+apk+latest+version', suggests a lure for downloading an application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/strik?utm_term=monster+park+apk+latest+version In PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/sopaxoduwojorojobu.pdfIn PDF document text
    • https://razebefalokugex.weebly.com/uploads/1/3/4/8/134895215/5771047.pdfIn PDF document text
    • https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/relitebir.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/be6171d8-3dea-4162-98b5-6af7611ba30e/daewoo_espero_sprzedam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3fd9bb-b90e-48d0-b96c-baf4c4019661/zakejim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944150a6-bd54-4dd9-8eb4-25ecf038543c/cappello_uncinetto_uomo_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e00f0d2-403e-4a34-acb3-17d367b1a913/88989264577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a74b69c-643e-4b94-97c9-85ef2e029b1b/99602886658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16889d0-54b7-4121-b151-9aeacc49675f/16426109073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0ffe3d-38af-4156-9184-cbdc7d8c0818/73097037841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1f4e8b-f739-4b5e-99b6-8b9d3e31d0b1/48525104049.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE91 4940 bytes
SHA-256: d8c192f677b3570e662e5c0271e72e4c93db1a0301742d34b4baad9bbd85068a
font_01_sfnt_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 10708 bytes
SHA-256: 1845cc6e6814ee267c53f91a3567fdbc8636c49afc74879bf53d8454fe7833ab

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