Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2478d8246ff015…

MALICIOUS

PDF

81.8 KB Created: 2021-06-26 13:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9343d0955a384e0c096894f146ca6893 SHA-1: 8857cb8ce228708d237fccef8b4b995f0c0f6403 SHA-256: 3c2478d8246ff0157b7d302e1536c2bfd95fdd775c7d301782594b145cec456d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071e4bfc77f4---97666395448.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b45da01ad38---3289377965.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/eifls5obaqvc3d75e6l3vng12a/tewileg.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3cc38639---nasukegexuvepaz.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609727ae26a88---34658318618.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/b9c6fb9e59619f7f8502753fc363fafd/bigobuxogigogilud.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf980c1ccb---fixube.pdf
    • https://kitapkaplama.com/upload/ckfinder/files/21514519807.pdf
    • https://imagebeaute.fr/userfiles/file/973220762.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/49b01be82e739b76ecd5f6572f8357ed/tusugepawogerigomanajeka.pdf
    • https://www.mds-horizons.com/upload/files/vuwimukuxu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/vefm5l7qdfr9ah3a1jkufhk752/33245811917.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a015017a20---55771669749.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/dbf2fb0dbacbec2c3a40eede6e501c69/47425291218.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073f22c74346---naxebokalikuger.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8bfcda5e8e55a1de7e5a90e5d3b51853/44966367268.pdf
    • https://barcelonamedicalcenter.com/files/galeria/files/fewojokodimogok.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a772827c4fa---15005877214.pdf
    • http://archissimo.eu/userfiles/files/jajagazuzajezajus.pdf
    • https://ascinfratech.com/clientprojects/trading/file/53473192043.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080033c11027---22306672629.pdf
    • https://adepotcustom.com/UploadFiles/file/20210526034738129.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/nepagebidazajalefupepesip.pdf
    • http://ligneus.hu/upload/file/fuwadawimubagide.pdf
    • http://carrozzeriardue.it/userfiles/files/67417307083.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=6th+standard+matriculation+tamil+book
    • 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_off0000ddd9.bin
5bb530b1050483cf9cc67f9327bc64c3822b05c6e230eda4a5773177de78e907
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD9 16416 bytes
font_01_sfnt_off00010888.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 16792 bytes
font_02_sfnt_off0001209f.bin
44276083f4ff810a4c1610aaccb1a6d2b0ad10a006d8c414c0b7da01ce29b19b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209F 10908 bytes