Malicious PDF — malware analysis report

Static analysis result for SHA-256 14eb61528adfea78…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 21:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 15ebef10792e81dde0f522028383fcbd SHA-1: c2695a328d9887e2f8fa7bf5c2d1d1b9dd3377e3 SHA-256: 14eb61528adfea789b7a1ed5babc5d58a10f54175e9185c636d05f87a879df60
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on domains that appear to be compromised or disposable. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest the document is designed to direct users to external, potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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://passionsavannah.com/clients/0/0a/0a61c075fa1d7d91f8ce2ef588f7e9ce/File/56977724519.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c35559add---tevovibezakor.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/17552117289.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/52137335291.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/dinezesadibuvozuga.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/58216778220.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/65334268913.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/m0hf48bisr49f752r0ijlf9u8m/bifofipedazugebidizorado.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/wejokunamumajomawajofu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/saguwaveriwumoxane.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/kukrudmegfdouceqqebiiel8e6/bivexidufobamazatijog.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/18916988296.pdfIn PDF document text
    • https://0900107678.com/upload/file/80644972918.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077052ef1c5c---bufisewesapujotexuweka.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9cce969e48bfe1f72ee6e26eb71f9a68/15871467022.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/rekurabutixu.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/74620049530.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b459348555---puledubujakegubusef.pdfIn PDF document text
    • http://peak-experience-japan.com/19031398396.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bmnehvnfdcu28e920um4qsj707/fewarisavudizotodi.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/75272029775.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/13795589100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=warhammer+8th+edition+rulebook+pdf+vkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA09 18116 bytes
SHA-256: 6e1c3038bada08981d62182eb39e1f01745ce06bdfcb3ab36a497ae15fda61b4
font_01_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 11192 bytes
SHA-256: 0d7712d14fb0c26c74d71bb604d591bf31234fe8cdd2231fd189d9b99a12ec74
font_02_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1