Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e84b26ba16da883…

MALICIOUS

PDF

53.1 KB Created: 2020-04-10 00:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b5b5dcd66b2fc82cb4bc3e66036d6ac SHA-1: 43361a04f2633e8cc889aeb5e69c1bef41435551 SHA-256: 1e84b26ba16da883a742cca963703fc8adb339cd3d6da88177ab59b8ecbf91d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links pointing to other PDF files hosted on various domains, indicating a link farm or distribution network. The document body, though heavily obfuscated, contains references to these external URLs, reinforcing the link farm attack pattern. No scripts were extracted, and the primary malicious activity appears to be the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://distancelearningtoday.net/uploads/1/3/1/3/131381991/131381991.html#crossfit+bodyweight+workout+resource+pdf
    • http://insidevoice.uk/uploads/1/3/0/4/130435672/gevani.pdf
    • http://voyagescimatur.com/uploads/1/3/1/4/131437832/c12cef.pdf
    • http://sailingphoenix1.com/uploads/1/3/1/1/131164063/5464126.pdf
    • http://theresearchblock.com/uploads/1/3/0/7/130776041/vodupemes.pdf
    • http://dorofabian.com/uploads/1/3/1/3/131398373/5471c0a7b1e9c.pdf
    • http://northtownsound.com/uploads/1/3/1/3/131398487/1398594.pdf
    • http://massagetherapistsacramento.com/uploads/1/3/1/4/131437604/f8de9ce17.pdf
    • http://botingundogs.com/uploads/1/3/1/4/131409574/kikoma.pdf
    • http://landofancientsmc.com/uploads/1/3/1/0/131070792/8dcdfc.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_off00008ee9.bin
78ca8bb120b711b1cc829d8cef2120e9d5ba66d9bc5a6d07a7357eafca5aa125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE9 8780 bytes
font_01_sfnt_off0000b061.bin
3486118c2e8f7d07da9246b32decec7cf0dc6a99892be4e917e5d3b68e6e59b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB061 16084 bytes

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