Malicious PDF — malware analysis report

Static analysis result for SHA-256 060d2906a404c97b…

MALICIOUS

PDF

88.4 KB Created: 2021-07-26 10:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 318c2dabd55a68304243551decdb0427 SHA-1: 79e428308df7b3f043a1dfc24b50178da477b845 SHA-256: 060d2906a404c97b08d2e8eea1ed8021488e48f9d4e35c87c09e9a8b6939d1ec
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to distribute malicious content. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d40c2ecd7---78371265954.pdf In PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/93398648905.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/57307989419.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/11098106640.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dfd88697c---67607004781.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607788762db58---midokezijevetixafuze.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af2041659---zazudix.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/g7p7eeqbsa6ia3en5ujkenhvgl/56126649656.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210716_010621.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a27a1d2d17---6595549046.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/94d36bbe4d726a5b3e1b7b0b45fd2f6a/29133116541.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/l9o7jsf7sppgc4n60970e6n1b6/xavaxavire.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084c26dbb639---xaliwavimidalomamatorofo.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/dejiseven.pdfIn PDF document text
    • http://samtle.net/ckupload/files/95381163475.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c4f1281f6---keridegoguxi.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/buwow.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a7dc3372---wemovamuwiw.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b38c3745322---56337479342.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071150bee7fd---97446670682.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/pafixilixibakuleponaferu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb579455f46---14724759810.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/48775826867.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/b01f44tda2qacmacb7kv6183d4/lovopawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=os+argonautas+do+pac%C3%ADfico+ocidental+cole%C3%A7%C3%A3o+os+pensadores+pdfPDF 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_off0000ed5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 19140 bytes
SHA-256: 0c98daa528eef2c5a346485c91e34ddae6c0a981bc51d6363b63539284ac72b8
font_01_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E7 11444 bytes
SHA-256: 3ccb5e8142dc42d23491907fcd6a27503c84926725a628a8cfc5a2dbf61f2af6

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