Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2feb047a3ab362…

MALICIOUS

PDF

90.4 KB Created: 2021-08-11 02:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4b2abc7d1d1b126eb3ad0477c5afc3d0 SHA-1: ce1af2ee99c509664eec9a6833fc05335349c1e0 SHA-256: 3a2feb047a3ab3620741c7c1712118a9dfeaadb90771c77e91b082ead47a0de7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a phishing or credential harvesting campaign. No scripts were extracted, but the presence of numerous external links indicates the primary attack vector is directing users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://youandisagenix.com/ckfinder/userfiles/files/21329817697.pdf In PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81327865a---48299714972.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21a7c99686---84786570550.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f702362df347b82e258fced123f20452/gamarajepebojezesigusi.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/2028325991.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/pd0rl50hlh6p20t2qleed0nndq/jotamabimiximuborafavu.pdfIn PDF document text
    • http://srhs1980.com/clients/877094/File/83510298464.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/14705536203.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795fb3cc457---firupepuwuwodiwikawixun.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/324d0e6f0ab5fef7e074e60f251b9a44/72891525957.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ca3021b1e---11393556931.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/gavomemufopoji.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/87466479930.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/61773618354.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/239fef1b17d805c9f30782f0c757920e/89468603598.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/diwinasizudurixe.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/wusasidugurufo.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/zaresagiwugudavomasalo.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/21084667100.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/tesilobama.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/pabijavefuwesoziwamu.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/81748237721.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/33716041100.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/0la086pjsufd0kribrfqmrf5op/92509557201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=should+ought+to+had+better+would+rather+exercises+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_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 17332 bytes
SHA-256: f1f8bc616fe749a5e2b4309d0ae7a7a38fb07f609ab6aebfa4b4bd4e2bd9a68f
font_01_sfnt_off00012794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAB 11296 bytes
SHA-256: a906d7563b1867b3a837730162f7340372619dcc9addb7a15011b37f153021bb

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