Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ed48281fe16f5a…

MALICIOUS

PDF

82.1 KB Created: 2021-07-30 02:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06fd9f637bba230cdc0c049daaa42896 SHA-1: f793c8a113eceb64556943534672e21d4ce3ba98 SHA-256: f2ed48281fe16f5a62de1c9c4048e9214acb3237e05e03c0e0a80ce1c3239435
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting its purpose is to distribute further malicious content or manipulate search engine results. The presence of numerous unknown URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6db7e057728ff6896c3fb2f3a15994a6/44645656880.pdf In PDF document text
    • http://prime-standard.com/piceditor/file/dadiwenezasubed.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/47383384827.pdfIn PDF document text
    • http://littlefreddieking.com/clients/65037/File/78792040549.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4a3417c62bb0a62f1de5de18a1cd6b6b/momon.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/21991856004.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16084374760dba---beranekekudu.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/12588963934.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4110a7e224---zegavud.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/peponigepitemipigip.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a33be50dc---76960230948.pdfIn PDF document text
    • https://jagominum.com/contents//files/78131554903.pdfIn PDF document text
    • http://armanetti.com/images/58669034794.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/3lnvt3f0mugdr56r9c17unlh1i/xixinanazunuzana.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/sinofafibin.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/380bebe01658837a27354361bbbbb788/53828203714.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/27860533026.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ebed60b2---61961076639.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/renatigimafokepofoneg.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb575634e---kudatesinakodevivokug.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/44039348061.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e538c7934---36541914668.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a0f93203d379e610495914b183d9bd1c/gokutabedidufoji.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/21530220162.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/12011082487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=never+back+down+no+surrender+2016+moviePDF 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_off0000da8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8C 17012 bytes
SHA-256: d0a67bb009e55986ea644e4c661b0b6e22565a185b8831012b7b201070dbcc40
font_01_sfnt_off000106f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F0 11312 bytes
SHA-256: e8eabc53418f09e4bf7355ab6a70ee423a2219e80df48f1971446e3caabc2f76
font_02_sfnt_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1