Malicious PDF — malware analysis report

Static analysis result for SHA-256 30819ee49bdaabb7…

MALICIOUS

PDF

88.7 KB Created: 2021-06-26 00:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed4a1ded783c55149a64c6498e8d507f SHA-1: c16cce6e35c4c59fcd77ec78c104964e9bd9e491 SHA-256: 30819ee49bdaabb7e43797e923c9afa8851617043e14d034a5e102f537beb27c
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

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://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b80a933eb---98543761563.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/afe715515ce5cbde64b73939ea2279c2/baxekejofuwiwepe.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980e67658ed---meresunipovibukotis.pdf
    • http://diysmart.net/userfiles/file/82157173726.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd5cc8f2e3---tudigupevaxo.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/e0jcatr9k1fi43q4tu5m5m66va/fanubexalidobenaxoj.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087816e59cd4---kixuwezepapaveboveju.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/r0tktsgieik6g9f37d6rifgc9c/68319619764.pdf
    • https://kaptenhoki.com/contents//files/98765241773.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e12b13819c---dazulibewenefev.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/acb12b582b15013628b61b0bfa591ba3/bedixofuva.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080964df1df5---mujoburisub.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b230d54fa7c---33010606768.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16093e69733c5b---nolokarupasumax.pdf
    • http://bassbasement.org/userfiles/file/roboguto.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/b83e0cbaed60b391f59c075ac1421d6c/2151572031.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/s2226s29ollmuvrta9g9hnmvo4/tonezik.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d1aa68df25---nabinolozowugeteve.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/0ba922816b1b0a6e3656a02b3774e909/24758623579.pdf
    • https://alshamiltrading.com/alshamilfiles/file/47251270545.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/592e91dd0cebb69a93370d020fb4ac33/kukurututabo.pdf
    • https://flyingfish-stay.com/userfiles/file/94701679945.pdf
    • https://cengilli.com/icerik_images/file/jarurexefomapinajut.pdf
    • http://farashimirooz.com/files/11855527657.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+use+salt+in+prayers
    • 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_off0000f971.bin
ab5cb6920a4f2b0e67ea4f13c8103ccd2b3c21bea97f4671a340d375aefd9ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 10536 bytes
font_01_sfnt_off000111a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 16792 bytes
font_02_sfnt_off000129b2.bin
a8e4abc80b7a9b19bc90f73cbd683e6999696fa22dba54556f74cbdb9f7d5466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 16992 bytes

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