Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97b940345d4ab2d…

MALICIOUS

PDF

62.3 KB Created: 2021-09-19 00:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2001044df89ff1d6dd690758c5864167 SHA-1: 8d01b3ee6ea489759f65d83174715fca011137b1 SHA-256: f97b940345d4ab2d5a8424a5596c2c43dfc2657e9945109f46bf491940d8e6d4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://pistant.ru/uplcv?utm_term=windows+connect+android PDF link annotation
    • http://hagelkonzept.de/userfiles/file/nujepiwugesebalapabegi.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/2108446237.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/70fafa91eddf1b5287eb087995ea521e/papogiri.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/12516606186.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fed27cd84---18994049824.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/modagiwifege.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/85035002881.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/16893425801.pdfIn PDF document text
    • https://s-oil.hoakhanh.vn/uploads/image/files/31715918659.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/29414086213.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/gasuxovuseseduvipig.pdfIn PDF document text
    • https://unaizahic.com/Files/files/tananigusuvawodifok.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/38503886182.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7dc39d6f5979085f5faa86a728c35523/pinuzolafijasu.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/gikug.pdfIn PDF document text
    • http://slsnn.ru/content/files/90232772193.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5d29fe671542d35350752a7fc1f3226e/pabegepujebowijezatedij.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/1980003601.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8350ab006b80c3cdf5f9bf30c9627b3/silusunezufowuwaduzor.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/44114594244.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/25595642795.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/33321236005.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/73112091117.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC7 10396 bytes
SHA-256: a9e6d84515fc83943a598eec56aef7214b42d9c8c272a141ce01de4871a8c799

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