Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c45eacbaa4d8d68…

MALICIOUS

PDF

89.9 KB Created: 2021-06-29 20:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ea6efa409ff8085a650e6f24219be01 SHA-1: 108286122d7516e782d2e60a2da292f9ed5732fb SHA-256: 3c45eacbaa4d8d68e1b8b2a7518350f376512b946d07b90884f909eb7022abe3
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be SEO manipulation or redirecting users to malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://alshaabcoop.com/userfiles/file/xanijokorikukalosesolep.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af6088d66d---30019578152.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/9sj1jcu88fkotqpij3piajke20/61231946712.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/82873fe3ekp38ncn9c22qnrgrv/68604922424.pdf
    • https://kovtec.pl/eurostyl/photos/file/garumejen.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c72a61fbdc---merenu.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d0502597a61a8f1db7c610bacc1d9da/80369788678.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/63650643823.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t2e86q86f7icj25gq99tgbhg6c/39470792446.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9cdc56547---74739513340.pdf
    • https://advance-pack.com/editor_upload/file/kexuw.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/kekomitujufo.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b3cc0c06c---73289163515.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16097ad1d10acd---volopewafapemigizakure.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/8aa0244b2efd3bb3daeac1afe913b074/dazazakukog.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070f2781b85f---68087330873.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2e937324ca85025254e12d9516deddf7/5047801059.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/44429982752.pdf
    • https://people11people.gr/uploads/File/budoridem.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67267428e---dakagazavovag.pdf
    • https://altaspin.com/calisma2/files/uploads/66601990631.pdf
    • http://daindnc.com/fckeditor/userfiles/file/42054031284.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c60016e30---27421780255.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+adjacent+angles
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e905.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 16088 bytes
font_01_sfnt_off0000fe3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 16792 bytes
font_02_sfnt_off00011651.bin
4aafec018547e68e21617540d3b043cbcc2c91c024918fb04cbe8990d88fe395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 10460 bytes
font_03_sfnt_off00012dd5.bin
6d61e314c9e751607ef0ce4e45083264fbfb13b37dfe338f7397a9b8d152e7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 17196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.