Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa504ade38cf2e2d…

MALICIOUS

PDF

37.1 KB Created: 2020-03-21 13:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ccad37c9a7a46086038f48f9b1454dfb SHA-1: e90043ed170d6c178a2bf5487cc8c8713fc364c2 SHA-256: fa504ade38cf2e2d4a7aae4969649970f72cbf42592661f2ae811e3ece7db7a4
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to image tracking and control, and includes several of the extracted URLs, suggesting a lure to external content. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious websites.

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://keatingphysicaltherapy.net/uploads/1/3/0/6/130620956/130620956.html#imagenes+de+seguimiento+y+control
    • http://whitegravity.com/uploads/1/3/0/5/130543170/wedezugidusod-dezifaxagonilud-tepipusi-jodigizekokek.pdf
    • http://webmail.ctvalleyviews.com/uploads/1/3/0/2/130273799/8c124145.pdf
    • http://a-ive.club/uploads/1/3/0/7/130776069/bojakafevoregezowo.pdf
    • http://www.regentimaging.co.uk/uploads/1/3/0/5/130542972/putaregir_dorejovif_gasuxu.pdf
    • http://sportyogalady.com/uploads/1/3/0/5/130589260/e0f3dd814db46bf.pdf
    • http://mylifebuilder.org/uploads/1/3/0/6/130621895/varizikixofili.pdf
    • http://beautybehindbars.org/uploads/1/3/0/4/130436458/zeropuludalabel_nivebukefabeko.pdf
    • http://insighthomeware.com/uploads/1/3/0/2/130271103/1307547.pdf
    • http://tegnpaalaering.com/uploads/1/3/0/7/130739987/rubidunebub-pilobane-ronoxobewera-sifawujopibanaw.pdf
    • http://sunnycaregivingservices.net/uploads/1/3/0/6/130621179/notalimofal.pdf
    • http://www.nanaslittleworld.com/uploads/1/3/0/6/130639851/kujitu-pobafunusizodaj-bipurujurefeb-bawor.pdf
    • http://www.staging1.uniquegraphicdesignz.com/uploads/1/3/0/6/130621903/donudajamalakeme.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_off00006793.bin
aabd2ba98e11e4e0ac89e470f53e81c6e834dca3f7385d76bfd1390a40f39261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 8804 bytes

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