Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c6c1265fdb4e7e…

MALICIOUS

PDF

86.5 KB Created: 2021-08-01 12:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1533c87a63269f6e4c85c2946c59255c SHA-1: dd2d95db4a6983f353957f0a5bc51b199e564963 SHA-256: 30c6c1265fdb4e7e0c418cddd76e2ec2f3981ebc3677617ccc387de0b62f8ead
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. ClamAV detection and ML classification strongly indicate malicious intent. The document body is heavily obfuscated and appears to be junk data, offering no direct user-facing content, but the embedded URLs and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b331f0ecbc8---97091404665.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d0ee6784c65f0f5be14e48b8a2361015/ziwuburoxexegezore.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9754080a1---xofebijipuwigosot.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/69ae8bd0e8e111ed3003f662aab2d728/99016900552.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cff9ca6b510---24011343737.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/elfb05tbv5er9sbo9thv1b7hsu/nageruvowapuvaruvabuw.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eacca4ad45---nopesavisaj.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/polelizoturido.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/592dca75e482342ae4d240996521a2bb/firumo.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/55390393537.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a0ade1fd---22078805567.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/onuod7ng56mj8i8mor3g0tg7ne/vepowawuwagi.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/64142469313.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb1050676b---rizepafugedito.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/60874057422.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/f1aade8452c0987d3425bb5b524dcaff/53300139476.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/31641198676.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/29730ecf52bf1d51ca64559a33d9d8da/75931837565.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/1116c984422ff75cb93aea6949ab631a/daxidamapeb.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/14533685325.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/77809623092.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ff9d66db---79748220029.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16071660d86fd3---97061963058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=jane+nelsen+en+su+libro+c%C3%B3mo+educar+con+firmeza+y+cari%C3%B1oPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 17252 bytes
SHA-256: 055d037eca76946926437dbdecdb624788045fcdad3b74361813f058abefaa43
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 11288 bytes
SHA-256: ee3c5e1569a14ab8869f372161b42f120d3baac62b722e4ba09997264e812c41
font_02_sfnt_off00011908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11908 16320 bytes
SHA-256: 281a8e0f5d6ff93c8b68c010f229fb6ad7bb76303726e8bceb98a17be6b52fdc
font_03_sfnt_off00012f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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