Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30f0e58031f3c9d…

MALICIOUS

PDF

87.3 KB Created: 2021-06-26 20:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67389e482443a0725becc018fafcefc8 SHA-1: 941645cd6342525a6439bb71eb23459f29f1dc4c SHA-256: c30f0e58031f3c9d32e535e816ecf63ea1311182e35331db224974523802d266
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with the 'Spearphishing Attachment' and 'Exploitation for Client Execution' MITRE ATT&CK techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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 https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc083b5e8---xozobenasuk.pdf
    • http://jorkurojus.com/userfiles/file/91327014951.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/096abf65f28db289634136b66689b146/gepuvudefebe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b2ef8f813---wasoke.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/9780219715a515da39d4243962320556/loxibefopuwonivisedapi.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/29bee1d363883ba6e5346e66aa1a45f2/8122571130.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9b61d8b7cc06805367913e96b46f3897/38656641672.pdf
    • http://campfirewtx.org/userfiles/file/rapupijoroduzewarutorunov.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d64c0a544---23907479241.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7f47e453ef58dc0fe4b7fa353020e7fe/regeni.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13dc00307---vupodugufojifopubib.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/3f64a2eba6dbe6fec3ce33ff80f49549/topazuxu.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/39b887a94c8281ce6c587b5a70ea6593/32867638392.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7c1443aef---89895044554.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088efbe3278b---75208473778.pdf
    • http://magendans.com/imagefiles/file/xejafololibop.pdf
    • https://deniz-sogutma.org/img/userfiles/file/85822708347.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f663caf2---5070773246.pdf
    • http://artechq8.com/beta/uploads/files/womuzifezunuzamekes.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c8ec40e5---79244685876.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96c4a7ac5f---27729097456.pdf
    • http://henri-ruch.ch/doc_pub/file/juwaxijorakek.pdf
    • http://parkhigh65.com/clients/4970/File/23851075459.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/96300166e39a25b7274beac3b97532ac/romixajudepamisuturok.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=puppy+crying+in+middle+of+night
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 16792 bytes
font_01_sfnt_off00010907.bin
71f57aaab115592edfc3ddb38aab114929372777de681c5230987702360f298a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 17016 bytes
font_02_sfnt_off00013527.bin
1bb5d857548983d96521001859f5cd1694b75a97aafa440a2367b157a8a0c060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 10952 bytes

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