Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0e2e076bcc7ef5…

MALICIOUS

PDF

33.5 KB Created: 2020-06-08 04:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0eeb667e6fcb7c497d5a050ebefc5c SHA-1: 22e589f79ddd2e83319c49a6f185f8b370acee3e SHA-256: bb0e2e076bcc7ef52bbc85daec6fb9243f21e5a8f858a3e4b716beb7f6448b5f
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to uniquely named PDF files on various domains. This pattern is indicative of a link farm or SEO abuse technique, often used to distribute malicious content or generate traffic. The ML classifier strongly flagged this PDF as malicious, supporting the interpretation of a malicious intent behind the link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://barkerwildlife.com/uploads/1/3/1/0/131071145/131071145.html#animal+spirit+guides+steven+farmer+p
    • http://onelifehealthwellness.com/uploads/1/3/1/0/131071289/jajero-zedababe-wefezupo.pdf
    • http://gigiandbettes.com/uploads/1/3/1/4/131452839/kevexabired-vavozo-legeno-dotokabizafomo.pdf
    • http://67wq26.bdgct.com/uploads/1/3/0/5/130588885/5d5069b4f9897.pdf
    • http://buckhillcoffee.com/uploads/1/3/0/7/130776033/jizaxawuzulinuv_vixamup_fuligo.pdf
    • http://araratmining.com/uploads/1/3/0/3/130313427/9508222.pdf
    • http://axaltamarine.com/uploads/1/3/0/8/130813975/rewavaberijelet_zitajapugi_jolewexewa_zexisonevili.pdf
    • http://calamity-exp.com/uploads/1/3/0/7/130775386/gekijipawo.pdf
    • https://subigeda.files.wordpress.com/2020/06/94329305073.pdf
    • https://lirajobavan.files.wordpress.com/2020/06/56393156722.pdf
    • https://jazimijeba.files.wordpress.com/2020/06/lanize.pdf
    • https://babigedumig.files.wordpress.com/2020/06/fipokigano.pdf
    • https://nazimopelaw777822773.files.wordpress.com/2020/06/funumulawawef.pdf
    • https://zonutubuw.files.wordpress.com/2020/06/sepupogu.pdf
    • https://kovevaso.files.wordpress.com/2020/06/94772446833.pdf
    • https://simogotagewi.files.wordpress.com/2020/06/45831218053.pdf
    • https://pavofozib.files.wordpress.com/2020/06/zolemozipe.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_off00005971.bin
37416b3535d99b890640f4e14171f0b2102b755ea011db519764cdd78103b58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 9676 bytes

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