Malicious PDF — malware analysis report

Static analysis result for SHA-256 2652907705f97966…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 57de1d68e8211a5b1a8a1fc1fccef6d5 SHA-1: 827d3a03dc58b6cf3d1aa3b51d9dd28ebff32800 SHA-256: 2652907705f979663c450ae1bfced231acf981b4586cf38f6babbccd8ae85032
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://corporatiegids.nl/uploads/files/mifariwobejok.pdf In PDF document text
    • http://www.contectrade.hu/fckfiles/file/boxetijoledorejuxunajed.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/32733482423.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/sodavekuguzegusorefirotij.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/repatawifaxuxotilanaxigex.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cc5ve8p7o52685nf3fe1nu40u1/31380482917.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d5725d36e---53147133244.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/11626098847.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd04693b47---fopaxeno.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/rijidokigutulip.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/kakikuvorudosal.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210605094144.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160729a837f6f8---padasulujogexedidus.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/70076476139.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/69606269154.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/89907e3f17cf035f2368d924679b3e64/1531929632.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_8FDB386D7583A476.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/zukoguzu.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7477030c5---wiserazudozuzilimala.pdfIn PDF document text
    • https://goodline.by/userfiles/file/32003245984.pdfIn PDF document text
    • http://iwishop.hu/file/6536615801.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7a78ec2bc9f47c31881e4dbefa851f27/75292580308.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/80250172427.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160805b1a2a5db---89062953691.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/55358994486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=free+reading+comprehension+worksheets+for+year+6PDF 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_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 17960 bytes
SHA-256: 29762cb6fb998e7a64ab956e71f19ed46aa3805d8f91f7b06906f081dec24440
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 11460 bytes
SHA-256: 4ec083c409dc0be466a068bd6eb3d6b9297e41c9e019517c1fc099f6b11d54af
font_02_sfnt_off000116dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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