Malicious PDF — malware analysis report

Static analysis result for SHA-256 064f96dcbc2513ef…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 07:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e745ed143cde7ade8529eef70bfed8e9 SHA-1: 1a693e86d78225b0d7608731428f117f9388e1ff SHA-256: 064f96dcbc2513ef1d6c1184c4f430268ca921f9189d7326f155cc4fba3d4695
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d526eeaba2a---88863567843.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bb96446534b---volinikowavenux.pdf
    • https://styliststudios.com/imagesTE/file/96380167696.pdf
    • https://hiddencliff.kr/FileData/ckfinder/files/20210712_ABCE1CC370AF6DAA.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a8c967efb---86779240915.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1jmt33ks4uovrqb9jgvpve4obi/kuvopatomiligupade.pdf
    • http://oceanstatevolleyball.org/clients/879495/File/javugizuta.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/mr4a171ruviahqm1jfr7pf3lb2/54037891730.pdf
    • https://ahreco.com/uploads/news_file/faxej.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f174bf45cc3---nuzimemev.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/j3c7rmt591aj9dbspgucmpleu6/92251088898.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/5shqs0e6q01sahij6p0hir6fhi/zunevomapotegoxizapo.pdf
    • https://mycocoa.org/images/upload/files/saxobe.pdf
    • http://pecsimutargygaleria.hu/files/file/65398983155.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9875694e17---42261054676.pdf
    • http://oishisushigd.com/uploads/files/68017327939.pdf
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/tepiri.pdf
    • http://10glazsikeyrosa.ru/file/kesesemuzotab.pdf
    • http://billsky.ee/files/file/97494219758.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/638e2fd514c0ce8229d3203e297a48b2/rixamowesofilogepefazijaf.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/04a65df2f97556ec05c37c7bd4496e02/gizunexijogamuso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cursive+writing+a+to+z+small+and+big
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf9c.bin
ddae4cd2925ae5c547a0cbdc7b130bf00470ace8073a2e30321b03249f8c29ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9C 11076 bytes
font_01_sfnt_off0000e951.bin
e4e31a1350cb2a5d34b83c3f9151c46ed1fb8d7ef4de64b64889d950fc037839
pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 16952 bytes
font_02_sfnt_off00011526.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 16792 bytes