Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e3ef646a19a595…

MALICIOUS

PDF

38.8 KB Created: 2020-10-02 21:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 550ff6b5d5f7142cf31a4a1a138470f4 SHA-1: 158578b919d3ef23406b782ed720aeaa4c16d484 SHA-256: 47e3ef646a19a59599d623dd1e38b912c62aa49ef331245f422c225360534d9c
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to these URLs and appears to be a lure for educational content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful infrastructure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=prepositional+phrase+used+as+adjective+worksheet In PDF document text
    • http://depeluz.cwlawpartners.com/uploads/1/3/0/7/130739107/1450378.pdfIn PDF document text
    • http://gapuzugu.bieresources.com/uploads/1/3/1/4/131437490/5663398.pdfIn PDF document text
    • http://xomutuki.cobh.coralleisure.ie/uploads/1/3/2/7/132740482/c7547ffebc5f9ab.pdfIn PDF document text
    • https://site-1038649.mozfiles.com/files/1038649/muwojoxupazepuguperu.pdfIn PDF document text
    • https://site-1041486.mozfiles.com/files/1041486/jarixaxotijuwirenetob.pdfIn PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/61650514978.pdfIn PDF document text
    • http://lorubiwi.thealtereddog.com/uploads/1/3/1/3/131383548/zuberupojozujub_sewurunititej_gabuxezibidika.pdfIn PDF document text
    • http://files.wilmingtonartcenter.org/uploads/1/3/2/7/132712324/wifevediwar.pdfIn PDF document text
    • http://files.educatedlittlemonsters.org/uploads/1/3/0/7/130739786/1895172.pdfIn PDF document text
    • http://zizaxafux.homedalefarmersmarket.com/uploads/1/3/1/0/131070001/141fb0b2c3c.pdfIn PDF document text
    • http://files.lovelyteik.co/uploads/1/3/1/8/131871730/wizisafokajefez.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
    • 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_off00004ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE4 5336 bytes
SHA-256: 0102df0796b2adf385d5716f95623fced1e704789ca31f4b96f3b71058a929ae
font_01_sfnt_off00006107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 9176 bytes
SHA-256: 07f465ff06e9361e915bc492d098be731fda6b0c385f4367584c8d78f4cc49c9
font_02_sfnt_off00008041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.