Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9af542c4a96e78…

MALICIOUS

PDF

88.9 KB Created: 2021-06-27 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3eaf6049b7ab09f7fecc07cbca3bd4a2 SHA-1: 0f53297dffc3c057ecdd411658b5bad551a179db SHA-256: ee9af542c4a96e78faaab251202df1f346486bfda7f827873bc56fbea007df6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting, likely intended to redirect users to malicious content or download further payloads. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather as a vehicle for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://alakharia.com/public_html/userfiles/file/walakex.pdf
    • http://15449010.com/FileData/ckfinder/files/20210618_26D18C5844136A25.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/lsoaqdas8e4fjpt7obbif5hk83/77600855708.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/3dda185cf370092060ec33281d843361/28248076183.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece8747846---84304195100.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a4160ee24d6---31797313111.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/295038ecc536a50d04aef4f043974bc5/madorefofuraves.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/boc26avrhda0htgj322ilt83ki/10447107125.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c965c62f35---jebuvubopu.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726aa8cd0d9---78332939443.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/c0751b764fb8adb5bcf901c008f3d332/42313806494.pdf
    • http://brunsfamilyreunion.org/clients/e/e7/e70b0594429ddd28dfd4dd2f61c76e80/File/jopaleremawivomogubaxeke.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c68897ca93f---42860710711.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/933dff681b2894332dc1f7a97baa5a8c/zomabozejugulut.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071991487c4c---62920831990.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6076ae2aa---wuwumigakegowuwevaniwabe.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/zumifefosoxexefeleruwuvap.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e991b284d7---rajegedegazaxuji.pdf
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/gefonapunof.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/81fecda6e166b44bb383644075297ae3/16029425347.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a50bba9c7---78932078466.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093346808bab---nomove.pdf
    • http://inezorviskids.com/clients/37546/File/geriverufidovusa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=good+words+from+b
    • 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_off0000fa0f.bin
a67e2f6ffbdb027b7b051dac0ff46325e4b28b524a23e6f4cd4bd79452dbd985
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 16968 bytes
font_01_sfnt_off00012629.bin
76aafdc4ed616259dd20691686aab28732b337542cdae7d0ccdf4831067e22a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 10144 bytes
font_02_sfnt_off00013ce7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE7 16792 bytes