Malicious PDF — malware analysis report

Static analysis result for SHA-256 596ace63737314f8…

MALICIOUS

PDF

76.4 KB Created: 2021-08-05 07:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb29433efbadece7782334c056c86cb9 SHA-1: 8e26b2915775f676885d22a6eeb8a6e5e2c21834 SHA-256: 596ace63737314f833aeaa5aac37a7251c61c3b489d148b0c7718d562047307a
64 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. These URLs are likely intended to manipulate search engine rankings or redirect users to malicious content. The document's structure and the nature of the URLs suggest a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2901

Heuristics 4

  • 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
  • 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://cructi.ru/uplcv?utm_term=appsc+group+2+previous+papers+telugu+free+download PDF link annotation
    • http://bettynblue.com/upload/fck_img/20210629/file/rokijeborolesemodufanazob.pdfIn PDF document text
    • http://asustainable.com/global/file/38170358768.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/xomofot.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/fodoxojo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f03ca2048a4---78335824054.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d38391558---86957547883.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/af46f5db6036c22e28c8ce91d48ad7ca/wukem.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea6a5df0b---xamez.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ce914cf2cc3---simapininu.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/90d4ceec88b098a92a6b60082ce702c5/duwasoweratodedoxupeloso.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/64225519808.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/nuzukigav.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/29936357644.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/kevasajixu.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/newomosajibazun.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/taxalufejelajasorizadajo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/9d403c5da7a588794a6c32909b93d2d4/sodajerevuzubeza.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c654d7ca0---tinivibuja.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/dunejar.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/wogizijexotikumekud.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/5e6504e474de2540535516f3de9d110a/92973089245.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/10375615230.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/86686066405.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/merovutas.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/ketiwobimukisijefe.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/28008540557.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7cc222947---20660783060.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/37086334733.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 11148 bytes
SHA-256: b4078f33def1a5ac88611cc0c334a1c7d421285eb34bb342260c7e641eb79c1e
font_01_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1