Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cacbd5eccdaae32…

MALICIOUS

PDF

96.6 KB Created: 2021-07-04 18:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d5d7c5089772b1940021d2b2f59d131 SHA-1: 8c52358611df28a4e73790c7b59f54956dd01174 SHA-256: 0cacbd5eccdaae32a520b0b34111d93812972799b12ba939702e01dd77ae5cc8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/793cd9892f43f6e2a770cd9221913e37/22708895048.pdf In PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2d1980716---foxixavekupeweza.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/lt70c5767a2q5aol9o7omkncl6/75998521507.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/61c3e750e504310bd121c665b56230c9/gitinokeposos.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5d13ebb0dad44f3ae4b214f58afcb80f/lalixufobeji.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/molulevedapo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/28358887538.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/rulisukiwadav.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/nlpj3l61k4im10lnv7ijonfiq7/70299437816.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f662293d8a---51139775123.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e081bf105---wanoguxuruxejag.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/275926477940fb7318d49ca3c3af6e3a/nuvisivawi.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/9a7j1k008bcpdabbqhcln7bq6p/panuxazasuboj.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/48fp93np4c05jc73rig2cd28i1/22709873354.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/70358d370ff1bbc17f3c93b655d52e74/96892151023.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/05aa648385a094dea6178606c4c4f8d8/siwagotajubivupekil.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/b7ece53c019b83f51e1a4a8326dfb658/27926452157.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/rafomejozijaluzivusagode.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/70eb9656590b2c995a7c977da4e96e0a/gulemunoxu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/7dbcbd884618656b961eac2c9f6ac5d8/65062823912.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/66963177345.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/54978898474.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/64506a36130f3616cf4ee77887d24ab2/15043054745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=working+50+hours+a+weekPDF 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_off00011541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11541 10768 bytes
SHA-256: 772118350e0b1dbc021c430c6b04247ff375148072af5da36db5447099eec76a
font_01_sfnt_off00012e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E16 18004 bytes
SHA-256: 5e7e2ef64ecda2ca43745cf5d1234131196999994252b6e8b098e923834e49aa
font_02_sfnt_off00015d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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