Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a287b004eb76ff3…

MALICIOUS

PDF

36.6 KB Created: 2020-04-17 13:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1906f693670bd06ca673cb142ee62db8 SHA-1: decedb8e583d78467bd4c5b172bc5a154f05aa1f SHA-256: 6a287b004eb76ff359ec3464602db3ac2d2827c6ca46ad31f5267226ec11b5f5
96 Risk Score

Malware Insights

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

The PDF file contains multiple external links, a common technique for SEO poisoning and distributing malicious content. The document body mentions 'dvd writer software free for windows', suggesting a lure to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://newparanormalsociety.com/uploads/1/3/0/2/130288381/130288381.html#dvd+writer+software+free++for+windows
    • http://redemptionposter.com/uploads/1/3/0/4/130491075/8004188.pdf
    • http://sabrinafurches.com/uploads/1/3/0/7/130739817/fafazojo.pdf
    • http://artitianupcycles.com/uploads/1/3/0/8/130813496/zawuguwur_gogakotuzizam.pdf
    • http://tgpaintersmaine.com/uploads/1/3/1/3/131382841/ganisefoke-wegun-porupanapikufi-dosez.pdf
    • http://multigate.org/uploads/1/3/0/6/130605273/jivexosupoxani_bevarepo.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_off000065be.bin
f8522a3548754db92278033081ca1c79688a605e10c6b873b05a654505827eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 8108 bytes

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