Malicious PDF — malware analysis report

Static analysis result for SHA-256 666b7145f33cc6b0…

MALICIOUS

PDF

37.2 KB Created: 2020-04-13 19:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a845ea90e0f97ce696c257b8d4ad98a9 SHA-1: ec35f8bb42f74cf4b1c67c8ef72ebde79efb2013 SHA-256: 666b7145f33cc6b0cfb42a6498902ddf8415c096feca8e1f6151dae9f5c91aa5
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, masquerading as a police report, which is a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are the primary indicators of compromise.

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://sfbaytherapist.com/uploads/1/3/1/3/131378840/131378840.html#prince+george%27+s+county+file+police+report
    • http://pilatesteachertrainingcentre.com/uploads/1/3/0/3/130379517/lidonugomilex-xolani.pdf
    • http://reaperevents.com/uploads/1/3/1/0/131070407/fowesev.pdf
    • http://themoonladder.com/uploads/1/3/0/6/130620650/5745b67515.pdf
    • http://ibodyacademy.com/uploads/1/3/1/4/131408465/e5acd3b187176.pdf
    • http://endstone.org/uploads/1/3/1/4/131438294/sesefibelobixodixi.pdf
    • http://nickfysz.com/uploads/1/3/0/6/130604882/zifew_pajonib_pevar.pdf
    • http://sweetwillowsoap.com/uploads/1/3/0/6/130639404/rifefogamakufi.pdf
    • http://burlesontrash.com/uploads/1/3/0/6/130620712/gidep-sinunasotonukuz-wasikidimoto.pdf
    • http://constructoraliverpool.com/uploads/1/3/0/7/130776016/pavazakomam.pdf
    • http://allegrowolf.org/uploads/1/3/1/4/131453847/823065.pdf
    • http://msaudreymitchell.com/uploads/1/3/0/5/130551064/1013c36d2d7745.pdf
    • http://rollingoaksmemorialcenter.info/uploads/1/3/0/5/130538891/743456.pdf
    • http://spatzen.hu/uploads/1/3/0/8/130874451/6519571.pdf
    • http://mysisterscupcakes.com/uploads/1/3/0/5/130589450/novivuputik.pdf
    • http://automotivepartsgroup.net/uploads/1/3/0/2/130289247/sezulolifora.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_off00006902.bin
46eb782e8ae1881dfbc5b73fc1e31713a2b0213dbbf9b53fdda25d1970c0f8c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 8124 bytes

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