Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7e4a2d1fe8f6df…

MALICIOUS

PDF

78.4 KB Created: 2021-09-02 06:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1e774f44ea7fd028b8d411dde0ccb443 SHA-1: a8d9a4d0d3f4991d0f5fce514a581452c28100ed SHA-256: 5e7e4a2d1fe8f6df39c2bb7f93e16f12eaf167298c701f1652ed39ccd9f55582
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/39e3c5ba7f4164bb20b913404666e298/masoselibu.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090c3d33db2d---wirejebarilaxijedexetiv.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4160532d36---rotinag.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/56648277003.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/tuzilitisixotukowobeg.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0706pdk9nngdsvs9e36dnatka5/nijaw.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/74698879645.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b129626b8---49014225062.pdfIn PDF document text
    • http://xnkvinatimex.com/uploads/files/jikivemejozujit.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///44605496611.pdfIn PDF document text
    • https://go2germany.ru/files/file/14742044776.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210814003218.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/2392682344.pdfIn PDF document text
    • http://saaretravel.ee/images/file/guledefi.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9fb33b913---fuwasinobinur.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/90970759052.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7166f4fc4fb7e6bbc2bd8f873512f53c/letamikewurakofivusego.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/da1ec489ed1f96c4a9109cba82187182/ruburesusegalelanutil.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/sogevar.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceecc13c5d---65001205476.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b85ee320d51---60177254836.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/puxujigaxowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=tagalog+meaningful+wordsPDF 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_off0000cb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 18604 bytes
SHA-256: 2a985a893e4431a22441bb173ecedcd06c6bceb64ade63405b1c983f03522f08
font_02_sfnt_off000112de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DE 10748 bytes
SHA-256: 82b46b59fe5f7a181dce696f5f9947e6c5fce44b141181cf4a99de1a4d6a54db

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