Malicious PDF — malware analysis report

Static analysis result for SHA-256 807d6a711457505c…

MALICIOUS

PDF

33.0 KB Created: 2020-03-30 08:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b80060fb412f5fa5c1f4375c2e2a8561 SHA-1: ae3582bbe6b3d2f273a07d09816a8cd578030887 SHA-256: 807d6a711457505c67e25744cdc32103f98431b02b2f24edf4c939320323b273
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. The document body's content, while appearing benign, is likely a lure to disguise the malicious nature of the embedded links.

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://hall-elopement.rominastiebenphotography.com/uploads/1/3/0/6/130621167/130621167.html#mary+poppins+vocal+score+pdf
    • http://cruzservicesnc.com/uploads/1/3/0/5/130544754/8cd184.pdf
    • http://itsprosperitytravel.com/uploads/1/3/0/2/130270775/7847863.pdf
    • http://mta-sts.mail.gortonsfloors.com/uploads/1/3/0/7/130776162/xaruwoza.pdf
    • http://timeshareheros.com/uploads/1/3/0/2/130291699/8030556.pdf
    • http://walkertoohey.com/uploads/1/3/0/5/130588473/xunuvaxaz-vukogebogovole-lipunedititobak-gufamalemagal.pdf
    • http://yorkbutchersgild.com/uploads/1/3/1/0/131070152/tosenidiburujavama.pdf
    • http://archwoodllc.com/uploads/1/3/0/5/130588586/6024795.pdf
    • http://destinedtodesign.net/uploads/1/3/0/7/130776486/fumuz.pdf
    • http://macauleyconstruction.com/uploads/1/3/0/8/130814121/71da5d5.pdf
    • http://soultriggerpdx.com/uploads/1/3/1/3/131379948/xurupof-karuv-munux.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_off0000598c.bin
9a48e80ea60197f439af2d28d4fda6589e6f54653ba8e85c0b609da4daeedb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598C 7612 bytes

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