Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff2bafdc6190e86…

MALICIOUS

PDF

87.7 KB Created: 2021-09-17 06:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 754d202271a1a2a64fcfcd460abfcab9 SHA-1: 059417f0cb9e68ffeda95603529abf9096d1e483 SHA-256: 1ff2bafdc6190e864b25b2ddca7f9964ad75cc079a14858fe2fb0c186a458379
96 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the structure and URLs point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://synerhu.ru/uplcv?utm_term=instagram+hack+online+generator+2020 PDF link annotation
    • https://robustbrakes.com/administrator/imagetemp/file/laxanazet.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-11/20210911200523972886.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/44038835099.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/kp8uokvbrs97obqe5o5s8ik41o/xenitokesopupizafawesu.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/lunetuwibijuwel.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143b63d0e855---75748896733.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/vaputuruwulujefaj.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/kadikuxukabegafesupuje.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/27840466284.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7396c955897c37f26f5fb678aaa0758f/61555914245.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/30648558918.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/5598808849.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/62181144451.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/diteketozepuvuru.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/94952730905.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/91596334495.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385475acb08---99907664254.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/32845781042.pdfIn PDF document text
    • http://pololanna.com/user_img/files/78025671455.pdfIn PDF document text
    • http://eternoohydro.com/d/files/gigopubagisinujitimi.pdfIn PDF document text
    • https://path.mn/userfiles/files/16621911243.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/54652529129.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/12066317250.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/79433380253.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/40324900661.pdfIn PDF document text
    • 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_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 17576 bytes
SHA-256: 1233506f572668ada996de9277e2fbfacc82d6ee07190b2cd427f90ccc7dc3f0
font_01_sfnt_off00011fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 10960 bytes
SHA-256: 0d095818b6229b282ff64a62cfd72e8f5b318d4f8453810fce1dde0dfa3ebfcb