Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ced8c39674d27d…

MALICIOUS

PDF

41.6 KB Created: 2020-03-21 17:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0a0de7f6ed8262ff368aba0d5dab5205 SHA-1: 39470a759142da38fd67b65b6dacdf795f107153 SHA-256: e0ced8c39674d27d1f16a7460ae5507b3814c22d8d592e114b07ffa318f0863f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many pointing to similarly structured URLs on different domains, suggesting a link farm or SEO spam operation. The document body itself is heavily obfuscated but contains a reference to a song title and the wkhtmltopdf application, indicating it was likely generated programmatically to appear as content while primarily serving as a vehicle for these external links. The primary intent appears to be directing users to potentially malicious or unwanted content hosted on numerous external domains.

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://empireblueprintrealty.com/uploads/1/3/0/6/130620758/130620758.html#anjaneya+veera+hanumantha+sura+song+lyrics+in+tamil
    • http://mrreynoldsmathclass.com/uploads/1/3/0/2/130272640/tijezusekimano_gijexapuvigadez_xamas.pdf
    • http://soffice.info/uploads/1/3/0/8/130874424/4013704.pdf
    • http://talktohealtherapy.com/uploads/1/3/0/5/130588589/2650640.pdf
    • http://neuroimmunekids.org/uploads/1/3/0/5/130551369/0d3e265120f36.pdf
    • http://blsmusic.com/uploads/1/3/0/3/130313272/5606868.pdf
    • http://vakinc.com/uploads/1/3/0/6/130639583/bevepatur.pdf
    • http://addicted-2-gaming.com/uploads/1/3/0/2/130272850/semif_nabikafaru_gofuwabewofifu.pdf
    • http://mibaccountants.com/uploads/1/3/0/2/130287536/nunupu_widoriza_pimawijetotopax.pdf
    • http://sandrataylorhedgesartist.com/uploads/1/3/0/7/130775258/6749665.pdf
    • http://www.plussizeweddingdressesinvermont.com/uploads/1/3/0/9/130969539/139e9c905627.pdf
    • http://amodernplace.com/uploads/1/3/0/2/130289558/xevasepi.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_off00007de6.bin
a5db2b3c7fff3a75b08f56f51ecc8afb1bc586e53d262dfbf3cd0797689f402d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 7060 bytes

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