Malicious PDF — malware analysis report

Static analysis result for SHA-256 599676dd6de5a344…

MALICIOUS

PDF

84.7 KB Created: 2021-08-08 04:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6653032f07c6fe7408ca90c975ef267a SHA-1: 5dfc5c3e15018daf19143cab1b300f300bffa6d7 SHA-256: 599676dd6de5a3448d429492a126d48b068bdc13a8b9b3910cb9988eca5e0426
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://synerhu.ru/uplcv?utm_term=perico+ripiao+2+pelicula+completa+en+espa%C3%B1ol+dominicana+hd PDF link annotation
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f542e1aabf642bcdf10ce04dbc5137ce/tenevi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca3ec50ed---binamikejepiweziz.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/lagaxuvok.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/11009418758.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/giridakurumudulanifupifus.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/32341939886.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/08462e9455e8d74dc4034c946bf21a6a/kuxemun.pdfIn PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/2534999286.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/41637447756.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/44077803426.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210709_D0D8F4842B1A4B03.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087224795469---72083225943.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/ribenuraripisokaromoduz.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/86631934931.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/51640445938.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/59dcae40a272754f81669ee55a15799a/nojim.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/1fb67fbe5ccc1630849918b151d43bf8/lutosozolutefebafirajub.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/66904056956.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16089a11b3095e---97050072578.pdfPDF link annotation
    • http://pantryscan.com/123cars/imagefck/file/lapenebubafore.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/38950419487.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/75302537988.pdfIn PDF document text
    • 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_off0000ca08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE219 17076 bytes
SHA-256: 6b5c0d661420a374bad24216000983dbf0fb7dc1bc8eaba5e2989467cc1657b7
font_02_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 17892 bytes
SHA-256: fc70fa8b1f88d84486b20be5a97b837c450c1ea496b0661e2b754c5a63f1f651
font_03_sfnt_off00012754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12754 11208 bytes
SHA-256: 51e9af400bcff51bb9ca8ad97298bd099e8b2db7e662fe4b1add0d5f0846bfd4

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