Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e181cf662e1808…

MALICIOUS

PDF

85.5 KB Created: 2021-07-18 08:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0ed68d47d244720769e68d2c40f340b SHA-1: 23f4e6afbcb298780b3199e1f50c6e2867a39e5d SHA-256: c3e181cf662e1808ed0b724354c0d4d444d0f17d39e5a2fb363b3328aa378d6c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage, specifically http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e109434a---pepita.pdf. This suggests the PDF is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d759c98a2b---najawizovebosolijizipiwuv.pdf
    • https://gbagencement.fr/uploads/file/59513266501.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/57a90afb523ffb084eef6dfdfe604cf6/xisamaxisab.pdf
    • https://ringid.vn/ckfinder/userfiles/files/wukajininamewuxakoj.pdf
    • http://massageindex.nl/images/uploads/pebuturajubuvid.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/95ab57f8640f3356aee750992f6b8924/99097362821.pdf
    • https://ayurvedaemart.com/uploads/file/12981008889.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/a099026df4970533ae2dbf0e8cf68c24/89770644964.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/75430989931.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e109434a---pepita.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/dcf59f9dda53279811131e59b034951c/kabinilabasiwodedumikaf.pdf
    • http://bmcnx.com/userfiles/file/62890357441.pdf
    • http://bomtvplus.com/data/board/file/20210511222531.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9eaa29f9f---bawifujabutanewedujibuses.pdf
    • https://marljivo.hr/UserFiles/files/sezorikadujilapigorip.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/ns302ffs4tks19a39rvtme2tf2/nozova.pdf
    • http://location-venise.com/italie_documents/files/56452572320.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdecb09213---16917001920.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/880kovqoe8soc7eqafn92d79d1/kanusakusamopejerupa.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/94f43089f2f73f8bab523efca68d78ba/81370208418.pdf
    • https://badoza.net/userfiles/file/moviverajas.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fbe47d1ee6791b70dadaaa8d16ac8dc9/37119984533.pdf
    • http://dyglas.com/userData/board/file/47241981954.pdf
    • http://pileshoppen.dk/userfiles/file/dedenusonivotupil.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+use+portable+storage+on+android
    • 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_off0000ec6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 16792 bytes
font_01_sfnt_off0001047f.bin
af69f6f9d3735491650bb75cb93fa1e383a855e9644a16dc24fe5cf32a1c7dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 16588 bytes
font_02_sfnt_off00012faa.bin
04bfdc1a243f702e612a9b95e0fd8794c6639dff96565e342344377ecf6c8dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAA 10884 bytes