Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc4e31bbde620cc…

MALICIOUS

PDF

38.2 KB Created: 2020-03-25 11:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df30e22e258f3f68cfe255d583a896a9 SHA-1: 5fd1174540048274d28fa953a3660230b9dea5af SHA-256: 6dc4e31bbde620cc0b327d754ca14525deaa4cd1199f411117b29c0180a65b33
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary embedded URL, 'http://pinpointcourierservice.com/uploads/1/3/0/7/130775883/130775883.html#que+es+energia+potencial+elastica+en+fisica', and many others point to potentially malicious domains. This suggests the document is designed to redirect users to external sites, possibly for phishing or malware distribution.

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://pinpointcourierservice.com/uploads/1/3/0/7/130775883/130775883.html#que+es+energia+potencial+elastica+en+fisica
    • http://rogerrodrigues.com/uploads/1/3/0/7/130740193/651644.pdf
    • http://vaporphoxxenc.com/uploads/1/3/0/4/130476050/464921.pdf
    • http://anchorfertilitycare.com/uploads/1/3/0/5/130538866/lulakurabigigu_nelurojepubam.pdf
    • http://www.shopglowdevotion.com/uploads/1/3/0/6/130621969/4548663.pdf
    • http://cpanel.chopsugar.com/uploads/1/3/0/2/130272415/5cd01.pdf
    • http://unfiber.com/uploads/1/3/0/5/130589252/3ac76dc7.pdf
    • http://www.byrondlaw.com/uploads/1/3/1/0/131069863/4761996.pdf
    • http://hotyogahighland.com/uploads/1/3/0/9/130969674/zebikulitifiwo-pefowowipi-panipexofoma.pdf
    • http://laurawinters.net/uploads/1/3/0/7/130776445/aa22fc92f.pdf
    • http://portpainting.com/uploads/1/3/0/6/130604465/4220667.pdf
    • http://lovealchemywellness.org/uploads/1/3/0/5/130589000/banulidodot.pdf
    • http://northcountypawscause.org/uploads/1/3/0/4/130489771/guxizevob-gotilufowofewuj.pdf
    • http://justicefurallanimals.com/uploads/1/3/0/6/130604335/10978e3.pdf
    • http://thewebsterfam.com/uploads/1/3/0/6/130605462/rujirepupipazur-rupalin-mokowarufasufal-wepaxesip.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_off00006ab6.bin
aba6b3e43aa6a8945e0d56a64c3b642afe356962820953d81502e80da7d68ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 8512 bytes

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