Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51f8deaf12073be…

MALICIOUS

PDF

41.0 KB Created: 2020-04-01 11:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b9cec4d364e6f97c45ee1879850075a4 SHA-1: 987be3102c5b54cf65da1363131e1009a8cd9b88 SHA-256: d51f8deaf12073be2b80529425f4cf152759f944889fa8a7816182c9f82a596f
152 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it functions as a dropper. The document contains numerous embedded links, identified as a link farm, that likely lead to further malicious content or exploits. The primary lure appears to be academic or resource-related, as suggested by the document body's text fragments and URL structures.

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.
  • ClamAV: Pdf.Dropper.Agent-9122838-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9122838-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://sjo105.com/uploads/1/3/1/4/131455463/131455463.html#practical+companion+to+ethics+4e
    • http://inversefootwear.com/uploads/1/3/1/3/131383333/8428353.pdf
    • http://callaneventplanner.com/uploads/1/3/0/6/130621803/ae6a23ac.pdf
    • http://charlotteshope.net/uploads/1/3/0/8/130814127/8800931.pdf
    • http://acloquelaw.com/uploads/1/3/1/3/131384539/juxozuwajetur.pdf
    • http://jrhythm.com/uploads/1/3/0/5/130538985/gaxuxuvi_modal_kiboxogutujegi_falijofupupaged.pdf
    • http://platinumprecisionvirtualsolutions.net/uploads/1/3/0/4/130475923/separ-pizelivuwelo.pdf
    • http://letstryinonrealdomain.com/uploads/1/3/1/1/131164239/bceb2d.pdf
    • http://pushingthetippingpoint.com/uploads/1/3/1/0/131070189/174228a5ad005f3.pdf
    • http://clementcanopycondos.com/uploads/1/3/0/4/130476074/robowaxefedadufu.pdf
    • http://thehandmadehydrangea.com/uploads/1/3/0/7/130740510/62a4c24ef.pdf
    • http://baop.store/uploads/1/3/0/6/130605302/tabesaxem_jowonijekekili_nemelame.pdf
    • http://sbcustomapparel.com/uploads/1/3/0/7/130775104/7862949.pdf
    • http://dgdiamondgalleria.com/uploads/1/3/0/7/130775646/tadiza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b77.bin
1f179b97234f7141755c2d800068ed5f1f9282a9d302726a49d8de79d4b2e191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 8340 bytes
font_01_sfnt_off00008bd9.bin
1e40e98b03ddbccc880877284e0fa26e3d6152a239967a2ea6f35cc1f6244ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD9 2604 bytes

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