Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0c9aa03e8b4edf…

MALICIOUS

PDF

71.3 KB Created: 2021-06-30 01:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3146b67ec35b447c61c633a65b4d53fc SHA-1: c13d9afb2fe9a0803d01f61476037ec64cda45b9 SHA-256: 1b0c9aa03e8b4edfcb3b567719341135a978b796b5359a4c68fe58da9c1c7c92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm patterns, indicating it's designed to redirect users to potentially malicious websites. Several URLs point to compromised WordPress uploads, suggesting a tactic to host malicious files or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://philabc.ru/uplcv?utm_term=fable+3+how+to+make+money+fast PDF link annotation
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2da5902ab863350a4c22813cba4db76b/fazexuwapebi.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/82751f20af40ff7db2f8002e12e76647/ridiwisoxolizukefe.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/44593e8153fd22b0d93d2fa46aebd050/sevonojamokewovepa.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/34061686380.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/vugisemekogiporonumas.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/wobadaxigod.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffdba9bcb---45991300268.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a466c69f13f---lolifefizulijususe.pdfIn PDF document text
    • https://dietacud.eu/upload/file/tokozonu.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/13776552203.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a985ea8e087---zutisemopo.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/jezepufalijediduju.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/6htsntuhhe17bq3u6bkiopll5p/vofavinefasabemivufevorik.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6aab81f305---kasojewametabalaz.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094167b8facb---podinixetumatulemilibibuv.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f5ad7ec28e6357c7cd5b7cb5a20028a/85037262782.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/98dda364040a2b9b5bbcc969f8d4e469/denobadejaludikajika.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4bd41a456---95064147785.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/a2d4872fadbe70b0e8ea4eb08d62c597/bupizagibeginatelad.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16074c504bb5f9---80191308581.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/nenukilon.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b127b1418fa---nekepilotoxakedot.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/32626483070.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_off0000b983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB983 10868 bytes
SHA-256: 3fb163576f201d6b91267e5c27b8fae216bf6797128d5cc7abe1ea645ddb0c19
font_01_sfnt_off0000d29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 15056 bytes
SHA-256: ae46517e8e9b814efee95e5183f6f8dca4d2788279ff35a2362117c3ca4a654a
font_02_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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