Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c0076c53e7a2dc…

MALICIOUS

PDF

39.8 KB Created: 2020-04-01 12:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 239202015f7690549b006fce797fb6dc SHA-1: 9cf350a9607f60a3b5ef9ca5ad5cfc91796565d8 SHA-256: 06c0076c53e7a2dc0c68cc3472eff182b6dbff7334f7c743d8896f21c605c0dd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating it likely serves as a dropper. The document contains a large number of external links to various PDF files hosted on different domains, suggesting a link farm or SEO spam campaign. The embedded URLs and the heuristic firings strongly indicate an attempt to redirect users to potentially malicious content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8077064-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8077064-0
  • 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://kellykampftherapy.com/uploads/1/3/0/5/130588728/130588728.html#burlador+de+sevilla+resumen+acto+2
    • http://thimori.com/uploads/1/3/0/7/130740163/dabulusoguko_gaboneta.pdf
    • http://qualisplus.com/uploads/1/3/0/6/130621625/sanutidan-pepida-pomavilojun-meritevujajupu.pdf
    • http://macshackatl.com/uploads/1/3/0/5/130552055/kebaxibexewad_xaguro.pdf
    • http://risinghopefoundation.net/uploads/1/3/0/7/130775267/surume-fugepen-masebozo-fibur.pdf
    • http://gozalinc.com/uploads/1/3/1/4/131452811/mafoxiw.pdf
    • http://conroejunkremoval.com/uploads/1/3/0/3/130379226/kubosazo_giviveroda_dudoli.pdf
    • http://uzibr4nd.com/uploads/1/3/0/4/130477633/fitopufokev.pdf
    • http://cleverpoochmi.com/uploads/1/3/0/2/130270907/4e4b18bd7017fc.pdf
    • http://cashaysthoughts.org/uploads/1/3/0/4/130483820/fawewi-xexefimezuri.pdf
    • http://turnheadcarwrap.com/uploads/1/3/1/4/131454696/ff06b.pdf
    • http://thedaleylifeonline.com/uploads/1/3/0/7/130739284/wugexusepuxi.pdf
    • http://smartsell.work/uploads/1/3/1/3/131381677/luniwunak.pdf
    • http://leandeployment.com/uploads/1/3/1/3/131398358/wojosi.pdf
    • http://wearewnc.com/uploads/1/3/0/5/130588501/14fce.pdf
    • http://judeelund.com/uploads/1/3/0/2/130289557/beburafe.pdf
    • http://ninjafood.us/uploads/1/3/0/3/130313405/wanufenebexutedemo.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_off0000731f.bin
8823fe20c7c57e9724cd6b3833d080392799790db746497a6bf92dc2bc2d0dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731F 8512 bytes

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