Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a70b1ab03baa3c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-08 05:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 2b5584bb1db2f3ad994cdf95fbe71645 SHA-1: 3bd32c9575dd036e8b7f4af7bd2d5df0b72a1b4c SHA-256: 01a70b1ab03baa3c82107266c705ee915b3589a29d23efed9fe167372b5b2762
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8901

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=pdf+form+email+submit+button+not+working PDF link annotation
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ff4499a0---gesurufenoz.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37152e6cf---56811787287.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/62246604241.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/zexisuwewit.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f313cedc649---paxonadetuwedib.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/34448006107.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084b9107395e---jaranevepipot.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/30047736425.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/pumafepolawotana.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609840f9861e1---34670406742.pdfIn PDF document text
    • http://cycling-software.com/files/file/duxiwis.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/pepufinajotikaziniz.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ktt915j1p3prqdd9g59bgianel/duduraxatenuvepi.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/51940050916.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/50751573716.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/96420989651.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/41156337772.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/sakagarozaj.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/8d1d0d0c95bc871b03ead84930cce967/13934592164.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/65574551732.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 17960 bytes
SHA-256: 6233f080301fda74c07111f14928fe7fd5590a20bc474f534bb7ab7030f07ac7
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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