Malicious PDF — malware analysis report

Static analysis result for SHA-256 7855cc6ce1cb28c4…

MALICIOUS

PDF

55.9 KB Created: 2020-04-03 20:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5fdcf8351f5ca4a7f674918db874623 SHA-1: 4a8d78e210090a4a37f51bb9845e6a4b48b97dab SHA-256: 7855cc6ce1cb28c47476ebc574409443bca562683f3fe270cacb57ac68465ba6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. The embedded document body text, though partially corrupted, includes a URL that is also listed among the extracted URLs. This suggests the document's primary purpose is to redirect users to a network of other documents, potentially for malicious SEO or to host further malicious content.

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://tcgrace.com/uploads/1/3/0/7/130775710/130775710.html#la+expansi%C3%B3n+colonial+y+las+rivalidades+imperialistas
    • http://roadshowarchitects.com/uploads/1/3/1/0/131070437/morelovamotare.pdf
    • http://toubkalwebtv.net/uploads/1/3/0/8/130874213/kotuxemosiriji.pdf
    • http://thesocialist.us/uploads/1/3/1/3/131398185/vanogifokitumiviw.pdf
    • http://bluechairvintage.com/uploads/1/3/0/7/130775786/2172937.pdf
    • http://zipzandjpegz.com/uploads/1/3/0/7/130740112/a48f3bcd1.pdf
    • http://embellishmepattyv.net/uploads/1/3/0/5/130545485/magokumudinezot_muriv_kurasevajet.pdf
    • http://npeg.eu/uploads/1/3/0/7/130776180/nobinit_wotuwupugaxab_muzipi.pdf
    • http://bjjbridgeport.com/uploads/1/3/0/4/130483294/a6586413b.pdf
    • http://visionglobalcapital.org/uploads/1/3/0/5/130542908/zogupunidu-kuromo-mavizowesojo.pdf
    • http://eagleeyesurveillancesc.com/uploads/1/3/0/3/130323774/negudekagesifosumob.pdf
    • http://lollypopstars.com/uploads/1/3/0/9/130969535/godisa.pdf
    • http://scrubire.com/uploads/1/3/0/4/130483653/gibixe_pubuza_nosez_dapaguwukate.pdf
    • http://rahellaserklinika.com/uploads/1/3/0/6/130604538/a641b715831c3f4.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_off0000affe.bin
c462797b11e33847052bd2701e92c5a38820b92fa9cca5474db15901ce8bbca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 8776 bytes

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