Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d03345148346e58…

MALICIOUS

PDF

30.4 KB Created: 2020-05-24 09:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d16223fc705bc5f4a918177d634d2357 SHA-1: fe19742bde2580ce27dd3a947d221486344ee8f0 SHA-256: 8d03345148346e58166358ee63c0014ceacf910fd31df43a78d3115db4ac2ff1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links to various domains, many of which appear to be part of a link farm designed to improve search engine rankings. The primary external URI points to a page that seems to be a lure, potentially leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://fly5c.bpmtc.com/uploads/1/3/1/8/131872269/131872269.html#clocks+coldplay+original+piano+sheet+music
    • http://jengrasmerejewelry.com/uploads/1/3/0/5/130588213/2b34202c37.pdf
    • http://ruralfestwainuiomata.com/uploads/1/3/0/2/130289272/9423128.pdf
    • http://myggle.com/uploads/1/3/1/3/131384503/8959426.pdf
    • http://scvfootballcamp.com/uploads/1/3/1/3/131380755/bakuvoge.pdf
    • http://ajakchinger.org/uploads/1/3/1/3/131398097/votizufupixuwaf_jagujagasan_fowiwowimarux.pdf
    • http://fleurdorange.net/uploads/1/3/0/6/130639851/3d6cef39f.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004997.bin
4d06676e9262667acafa04b4e642825755ad0e4a7a9dec76705cacf8858bda91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4997 10848 bytes

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