Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2382be2d43a255…

MALICIOUS

PDF

71.2 KB Created: 2021-09-14 12:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bc45653ad8aa9b74ed0d304b9894c024 SHA-1: 40de05e6eb4e6546bcf9fd5b9f0d960cdc738bc8 SHA-256: 0f2382be2d43a25528ff4a92c8473f667642f4f46aef50eb393bb4fe27ce3a2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. While no scripts were extracted, the presence of numerous URLs on potentially compromised domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/ac4b416f46cc0b5d77a3ccaf1a37f615/66157372106.pdf In PDF document text
    • http://pokewaveanaheim.com/uploads/files/75184388182.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/925cdcbd71b67e09b4c2b95593c07753/82961399070.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/90921777140.pdfIn PDF document text
    • http://sbcnepal.com/images/file/putidujoditofatawo.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/vedexusinepivuxosefezak.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/sezefetigosinadekofumig.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/el4g8o9kacdjhnh92sop2t7sp9/ravetatabubog.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/retugawekifefimi.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/69231845494.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/vulimidipuxutamiwejew.pdfIn PDF document text
    • https://isleo.com/i_photos/file/62200661447.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc9c815139---34901782176.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/rusikerukisuketuzi.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/65881950058.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/xutowexodelelesa.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/pigujuruvapanuzapikanimam.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/tafesobagoxumolupukunusip.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/fakuvotivetuvekemu.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/32929814076.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/33131349455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=wild+rift+apk+iosPDF 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_off0000b693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB693 16224 bytes
SHA-256: b3e143c3e84c259f17fe8c2fa3f6e98514f182838729f4107b003eb9d26fa84f
font_01_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 10340 bytes
SHA-256: 25cc5267d541fc45942dc467ae239643bbe954ea3fd7ae99187237999c2d3d3b