Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc71385305409fea…

MALICIOUS

PDF

43.3 KB Created: 2020-06-03 22:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e31025eb88c7051e3765e37dce4ccf5c SHA-1: c0e6d8c197066b417bc70ead7201df69c0105c17 SHA-256: cc71385305409fea7de1fa0744bb6aceab39e81cfcb29bb424c90c28fb927192
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links to other PDF files hosted on various domains, indicating a link farm. The primary URL points to an HTML file with a query string that includes 'raldbthar deep market 4 button puzzl', suggesting a potential SEO manipulation or content delivery scheme. 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://naturesblissyoga.ca/uploads/1/3/1/0/131070489/131070489.html#raldbthar+deep+market+4+button+puzzl
    • http://labradoodleuk.com/uploads/1/3/0/5/130551256/nekizijuvetuvipomogu.pdf
    • http://parklanemotellaunceston.com/uploads/1/3/0/5/130551230/9ada9c5c64be.pdf
    • http://justintimetoshine.org/uploads/1/3/0/9/130969829/tojiv.pdf
    • http://mcminnvilleaircraftmodelers.com/uploads/1/3/0/5/130540501/zagobemodamobi.pdf
    • http://cleanfreaksatl.com/uploads/1/3/0/5/130551247/fa274df0a549.pdf
    • http://thequickenloanspartnership.com/uploads/1/3/1/3/131378806/9690773.pdf
    • http://john-deere.online/uploads/1/3/0/7/130775527/mijagez.pdf
    • http://armycorpenterprises.com/uploads/1/3/1/3/131398022/munalatilod-fasalo.pdf
    • http://gemsdelicioustreats.co.uk/uploads/1/3/0/7/130776603/gotobasur_gagewabigopego.pdf
    • http://mx.ellieaaron.com/uploads/1/3/0/2/130288380/858970.pdf
    • http://naturesblissyoga.ca/uploads/1/3/1/0/131070489/terms.html
    • http://naturesblissyoga.ca/uploads/1/3/1/0/131070489/dmca.html
    • http://naturesblissyoga.ca/uploads/1/3/1/0/131070489/policy.html
    • https://sowekurodaji.files.wordpress.com/2020/06/wubogurufimitubejisanomuk.pdf
    • https://lafukaraziba.files.wordpress.com/2020/06/70393988382.pdf
    • https://nelofejinuri.files.wordpress.com/2020/06/24705639480.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_off00007ee7.bin
0231cabb56cd2238887555e1c420c395ad23c0df61d9a0ae807ab36d602e2e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 9976 bytes

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