Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cb27f1a34b0f7b…

MALICIOUS

PDF

36.9 KB Created: 2020-04-10 09:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 254307ce6837670bf73f2c0954542b50 SHA-1: 459d96febc92540ec8ffbb2aa6c8da36d59bfcd8 SHA-256: e2cb27f1a34b0f7b9b079b4e7118d82d523da0b0fdfe4b356a573ddec528266f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to direct users to malicious websites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely intended to lead users to further malicious content or phishing pages. The presence of numerous PDF links suggests a link farm designed to manipulate search engine results or distribute malware.

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://tokped.services/uploads/1/3/0/4/130490461/130490461.html#fe+c+phase+diagram+pdf
    • http://threetreescreations.com/uploads/1/3/0/5/130551630/jonezamiwudobi.pdf
    • http://anantio.com/uploads/1/3/0/3/130323814/444c9e1762744.pdf
    • http://silkypetusa.com/uploads/1/3/0/6/130621950/nexena-zafazelada.pdf
    • http://elensgroup.com/uploads/1/3/0/9/130969341/9401109.pdf
    • http://campusministry.net/uploads/1/3/0/6/130639936/volejewasawaga-xaxileladobije-zufizag-pabenefowa.pdf
    • http://thetucsonroofingcontractor.com/uploads/1/3/1/6/131606605/kifixizizeji_gubesip_xupulutitegerom.pdf
    • http://90eastofficecampus.com/uploads/1/3/0/3/130379380/fopuvusenonog-dababidax-vizufo-zuzoxobup.pdf
    • http://fshmason.com/uploads/1/3/0/5/130551749/c91302ae91758.pdf
    • http://thedragonflyjewelrystore.com/uploads/1/3/1/4/131437695/6535196.pdf
    • http://lgjartworks.com/uploads/1/3/1/1/131164574/278a3d54ec76.pdf
    • http://lorettasthecraftedbox.com/uploads/1/3/1/4/131437862/pesuguvogikatobujij.pdf
    • http://killeendirectv.com/uploads/1/3/0/8/130873895/ed5de005163.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_off0000667d.bin
6c4f96c1fc437269fa1413f2efdbb40112c641c6010d5988fab2283a101d2958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667D 7980 bytes

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