Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1eccfb4ec12839…

MALICIOUS

PDF

41.5 KB Created: 2020-09-30 23:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380fe806b37524e9b0d19d66e5b3b600 SHA-1: 14a3f48e1269ea4570c7d4969fe1911624968e10 SHA-256: 2e1eccfb4ec128391b36bdd841cb17247a23c1f7ae4c8a8439af32f7d84088b6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, with a primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Fifa world cup 2018 score sheet pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=fifa+world+cup+2018+score+sheet+pdf
    • http://files.kamalmus.com/uploads/1/3/0/7/130739240/cd286ee5185556.pdf
    • http://files.jennybirmelin.com/uploads/1/3/0/7/130775192/61fa549958.pdf
    • http://files.bellabugphotos.com/uploads/1/3/0/8/130813466/757377.pdf
    • http://files.grignonmansion.org/uploads/1/3/1/8/131871705/zetabijejisinixako.pdf
    • https://site-1037219.mozfiles.com/files/1037219/15660675474.pdf
    • https://site-1036678.mozfiles.com/files/1036678/jesisomozanejujimumeb.pdf
    • https://uploads.strikinglycdn.com/files/3685acc9-9925-4fde-a80f-15b286efb492/feritebavurowuzu.pdf
    • https://uploads.strikinglycdn.com/files/a9ffb37e-26ef-429d-a59d-0942047f47ec/gutifosofire.pdf
    • https://uploads.strikinglycdn.com/files/1e900024-42df-4b38-bbc9-8f71c25e3515/32093717268.pdf
    • https://uploads.strikinglycdn.com/files/3a96b64c-faf6-4cdc-b672-b87e09448da1/nedasakesufumexu.pdf
    • https://uploads.strikinglycdn.com/files/8d29cf32-21e0-477d-8a0d-54d28c8323bd/63343430967.pdf
    • https://uploads.strikinglycdn.com/files/31f66fe1-7e5e-451b-ba34-9eb516f1abb0/59334581907.pdf
    • https://uploads.strikinglycdn.com/files/f00a122d-3c89-43e1-8e9d-c019cebbc6b4/22789615665.pdf
    • https://uploads.strikinglycdn.com/files/87fc7909-3405-46cc-8760-3e67264d61fa/puloxuxopapilewobuwaw.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006300.bin
1eaa6db51c700fcc446a7b975996df38c90aa29a0f9cf475d1e84945e2843010
pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 5812 bytes
font_01_sfnt_off000076e0.bin
33002d110ddf01a27c96b4c43fb1c029a3babe5d7caf969350b7e183599f8705
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E0 10092 bytes