Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9d299a55cb44fd…

MALICIOUS

PDF

71.5 KB Created: 2021-09-19 07:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd246309d040c4f35a45fe3287ed66b1 SHA-1: 6c7cb7750e31a452308e5d715e8f58f5229e5723 SHA-256: 2e9d299a55cb44fd321b0976e0ee168aac07df65d77e3798505fa0ce32f36acf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress uploads and other disposable hosting sites. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=apk+pokemon+gcc PDF link annotation
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/58dcc7e4f2e1f73fc10b0cbc4486c5fb/dixefenofelomibo.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/96095741818.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/jetojuxinobakixigixi.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/88978335558.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/07/file/20210907_111500_111.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdac709e34---fuxajeso.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/10368788165.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/89479063171.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/53665357751.pdfIn PDF document text
    • http://licausi.it/userfiles/files/5794015661.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/warurazivarosiroxavo.pdfIn PDF document text
    • https://alohasafaris.com/files/guniwubevixosujutokumo.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/dafinulekabezopabizalimo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139874e5f42b---wexaz.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135529b56f2f---62544198750.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/73333231221.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e307dac6e.pdfIn PDF document text
    • http://hadt.vn/upload/files/44174606155.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210904184949.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/pesifofamafizuzoboxid.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/finorigas.pdfIn PDF document text
    • https://matrixx.lu/images/vilonuteb.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/76750581543.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/sakelixere.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_off0000b498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB498 10124 bytes
SHA-256: b7972bb14fd380e3f45493b66ffd1dfa7ba4b6505a8ab3cb985a2cf70252d002
font_01_sfnt_off0000cb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB30 17460 bytes
SHA-256: d87c5bff2316f7d0279dbdab9b0ffc7fd54e655ff8ee881bdaafb8e297698225
font_02_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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