Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ae6a398b268d9c…

MALICIOUS

PDF

40.6 KB Created: 2020-04-14 02:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6c27608097b4fc67d3ea5a09979587d8 SHA-1: 0b733e92b52d4b7b49fad71ada9f614716420605 SHA-256: 12ae6a398b268d9ce9a2fb2b8251a755e9df946c434b6407e9253570cf321116
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on various domains. This pattern is indicative of a link farm or a method to distribute malicious content across numerous sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous external links suggests a potential for redirection to malicious sites or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://frasersgifts.com/uploads/1/3/0/5/130544878/130544878.html#fishbone+diagram+visio+template
    • http://peteraltschuler.net/uploads/1/3/0/7/130740419/466a1d.pdf
    • http://lafamigliak9s.com/uploads/1/3/1/3/131383602/581224.pdf
    • http://esportsrisk.com/uploads/1/3/0/5/130588480/148ade976.pdf
    • http://hellotherepr.com/uploads/1/3/1/3/131380754/f3ba6.pdf
    • http://newlookeyebrowsandspa.com/uploads/1/3/0/3/130313319/1a2ffce9caf67c8.pdf
    • http://auntiemimisfarmhousekitchen.org/uploads/1/3/0/6/130603946/8010792.pdf
    • http://furrowsaliteraryjournal.com/uploads/1/3/0/2/130287284/nigopofu.pdf
    • http://artofthedead.net/uploads/1/3/0/3/130313657/xaxipa.pdf
    • http://ciadelamancha.com/uploads/1/3/1/4/131410872/210e5d3b74b682c.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_off0000798e.bin
a12ee48cb1ffbde136cd14976af7ce15ccc8068dad2eeac4e7e5831f68bacf8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 7392 bytes

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