Malicious PDF — malware analysis report

Static analysis result for SHA-256 323d60ef4b8d26a7…

MALICIOUS

PDF

89.6 KB Created: 2021-08-26 02:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9b272ca09d48a5b056c09a170d806912 SHA-1: a67893278436edb6f7054c6bc7a400adcefed76e SHA-256: 323d60ef4b8d26a711913eb8bd2faf3e4a0daa1a48f138b27a54a20e6d34b7af
156 Risk Score

Malware Insights

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

The PDF document contains a link farm, with many URLs pointing to external websites. Several of these URLs are hosted on compromised CMS upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72fd30385f---77552713298.pdf In PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/92956441549.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/0shvj8jfq2u37944at30jaot57/xakivadovuxubemoburalugu.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/mitawonimisabexovivir.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/linobipozadogolunav.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/ziketigumavijexibadaf.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a30dd4eb072---lupovumobefidelelaw.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///51648611521.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/51009650336.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6ri10pfi8ohtp257douro7ck3/74193924233.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f805d7c36---62001722398.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/74899779010.pdfIn PDF document text
    • http://masonhn.com/d/files/xibuwibib.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/98112180166.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/batug.pdfIn PDF document text
    • http://jrjohnsonfamilyreunion.com/clients/0/09/090f04f22b165063c0e57546eb93b169/File/94051644819.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/2c7er81fdib18c1al1bl2b2eo9/puzekiwezoduderi.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ad72a539e68c2f8020d9850802919281/9664183779.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/76040726999.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/be94a0497e36b7bc11e1778677f2a199/3653118622.pdfIn PDF document text
    • http://24cvety.ru/upload/files/sezerodelasif.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/pojavima.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/95005985728.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/39334813158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+get+latias+in+alpha+sapphirePDF 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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 18432 bytes
SHA-256: 58f13039ecf30f22dd744fd6b55270731ba4c7e0380cc410b9bd1f4a2eabe28d
font_01_sfnt_off00011b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 2908 bytes
SHA-256: 39c66ed28e7f4320c0b5e7c8f5497437a5d35416e1687902d4ba46a76535b4f2
font_02_sfnt_off00012773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8A 10608 bytes
SHA-256: ebf35e8387b59352279e72f5c4061378ba9a0c559e281cfb983d7c31e5756768

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