Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f41e410ae30d7fe…

MALICIOUS

PDF

43.7 KB Created: 2020-04-15 14:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1fbb9bb9d3f998c0c33f90edd5f18669 SHA-1: 26b45c55268e4d03d651e330363d095785139dd5 SHA-256: 0f41e410ae30d7fe1fb74bb3566c86e602e5358f0b38a4a4eee1a8ef155261d6
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie download. The ML classifier strongly indicates maliciousness, and the presence of many external links points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • 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.
  • 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 http://avabaycompany.com/uploads/1/3/1/4/131406852/131406852.html#aflatoon+full+movie++720p
    • http://monzepm.com/uploads/1/3/1/4/131452883/duvalegalo.pdf
    • http://tangelawaldenministries.org/uploads/1/3/0/9/130969555/96403404.pdf
    • http://regionallocksmith.com/uploads/1/3/0/8/130814070/1877131.pdf
    • http://dansconcept.com/uploads/1/3/0/5/130588319/xodoxibimut_vukafakosi_zegunug_dusuzeta.pdf
    • http://nicelydoneauctions.com/uploads/1/3/0/8/130874001/webivu.pdf
    • http://sproutbodyworks.com/uploads/1/3/1/1/131164311/vefawe-vazumisajubi-finipelakokix.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006494.bin
5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 6728 bytes
font_01_sfnt_off00007536.bin
093ca82384c51e2a3629a104f0172b74000230725f16a4472346c710cdc79ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7536 8952 bytes
font_02_sfnt_off00009775.bin
f89c0e0946aa0d1e48aa5356a2d31bc24f5b96ca1f2cb84330b25817f6444d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9775 2024 bytes

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