Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b47d7cd8f94a82a…

MALICIOUS

PDF

39.2 KB Created: 2020-11-08 18:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0cd6e65ef2b535079514abc47a1797 SHA-1: 5be048d61c469d0d55f5cb91b13f6028878196af SHA-256: 0b47d7cd8f94a82aac7b90384764c5210f2c392cde9fd88128f53c5ef73a4b7d
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a tactic to drive traffic to malicious websites, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=house+on+mango+street+pdf+free
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/e547870242c6c69.pdf
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f972fc32497c.pdf
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/rijazati.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdf
    • https://uploads.strikinglycdn.com/files/2ac8409e-f8d2-46a8-a775-c361888999b6/coin_master_free_spins_links.pdf
    • https://fovekurosuto.files.wordpress.com/2020/11/92915359040.pdf
    • https://uploads.strikinglycdn.com/files/023c68cf-d59d-4e83-b83f-206bdee8f1d4/showbox_apk_download_latest_version_2019.pdf
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdf
    • https://mepugen.files.wordpress.com/2020/11/javugivoxoxapajan.pdf
    • https://uploads.strikinglycdn.com/files/c9328ef3-e3a1-4188-8c13-1f5d9e3f58b7/varetulune.pdf
    • https://s3.amazonaws.com/rozebofukixus/palefiwoxokekuvojaxexiwi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c21.bin
9f3fe93e0673dcabbe23304601cad89c4b3be876ea1dd29169e550823cefc6d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C21 5292 bytes
font_01_sfnt_off00006e09.bin
a6ffdaf43ad8c8f30dde62ee4a88fcfed28512729a92e8ce1b2a616205a47ef1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 10032 bytes