Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0eff6fb8716179…

MALICIOUS

PDF

47.8 KB Created: 2020-03-29 15:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e62c89f035dde2a2f30a2b0b2c6bbbb1 SHA-1: addb4b7af3244f587caea4289a6a8fb74c16016d SHA-256: ae0eff6fb87161790d8641dc0631fa3d52d9f1e63e1e21a60a6b017d95493ac0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains a primary URL, which is part of this link farm. This suggests the PDF's primary purpose is to redirect users to a multitude of other potentially malicious or spam-related PDF documents hosted across various domains. No scripts were extracted from this sample.

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://northernrailleaders.com/uploads/1/3/0/8/130874210/130874210.html#concepto+y+raiz+etimologica+de+etica
    • http://accentoptics.com/uploads/1/3/1/4/131406861/foveve.pdf
    • http://freecarposts.com/uploads/1/3/0/7/130775970/8386034.pdf
    • http://www.collura-art.com/uploads/1/3/1/3/131382382/1d593838.pdf
    • http://investorgraphy.com/uploads/1/3/1/3/131398406/gilufalen.pdf
    • http://coveinnonnaplesbay.com/uploads/1/3/0/3/130313339/d525ccc7.pdf
    • http://paulcorderman.com/uploads/1/3/0/8/130813961/jerox_tamila.pdf
    • http://acghealth.solutions/uploads/1/3/0/4/130476791/9144681.pdf
    • http://paganbrunomontgomeryllc.org/uploads/1/3/0/2/130270946/7042767.pdf
    • http://fullbelleconsulting.com/uploads/1/3/0/5/130588976/zovilig.pdf
    • http://virtualassistant-usa.com/uploads/1/3/0/6/130605324/fasiwefefugax.pdf
    • http://bluedragonsband.com/uploads/1/3/0/7/130775735/xubinokager-jukube.pdf
    • http://crewsinsurance.net/uploads/1/3/0/5/130543053/1365f6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb8.bin
1f2a3ca960b42f1cefb55e12535985d7c0bed6c911fc60a3f1d58f61ae521285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB8 9464 bytes
font_01_sfnt_off00008d49.bin
feb765f3641c47c4de4b48d4fd54f6b4e337440470ab68b0714c4dfbffa36fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D49 3704 bytes
font_02_sfnt_off00009a31.bin
b5d592fe28f2cabc4f457bd51ed3a810b420acf1afb14ac7b33f0d9e04c861fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A31 16148 bytes

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