Malicious PDF — malware analysis report

Static analysis result for SHA-256 0709325dfddea563…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 22:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 995cdeb1410a63d04a5f2b60706b2830 SHA-1: e2fb4dd8f8b2d6e969c826bbbd9b870f63e48af4 SHA-256: 0709325dfddea56361ab007fc5daf8a850cdf857f94df24e94b8338c6aba891a
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b1084ab9726---ronobewegog.pdf In PDF document text
    • http://lammensfilip.be/uploads/files/wuwanilunizuvitibefoliko.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/zevixe.pdfIn PDF document text
    • http://sy-smile.com/upload/files/63673438139.pdfIn PDF document text
    • http://parilka.by/var/upload/file/68875089537.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b410ceabfdd0f44a728b37753baa3401/93727109201.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/954fe65fd4b3415fd27da8d808e4ebd7/57384846423.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fadd2df0e4c---muxeselisamagowu.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1610a4d2d9f5c2---sevewezuzuladodujetugebog.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/50632176136.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/gimupolefaba.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/rawumelazugegujanu.pdfIn PDF document text
    • https://diphong.com/uploads/lodemuzudifozaboz.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/deditafogitipojunumuj.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/situjuwazopilijemirupefi.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/ba8655e43efb3e77fff3f83534d27e27/piwusazibi.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0dbb03f29---rorimukurukiwuzedo.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/33844297312.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/kubukedizukesinofagodewel.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/sasaki.pdfIn PDF document text
    • https://expomediainc.com/upload/file/folobunidilujutafelon.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbadd210a0---31443197959.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/perugakoja.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210527091825626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=dictionary+oxford+advanced+learner%27s+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_off0000c86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86C 10932 bytes
SHA-256: 5c1f9c86708314de6d1d7617ab12fcd9b22b695f6acfd6f632376204c8c7a7e9
font_01_sfnt_off0000e201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE201 18540 bytes
SHA-256: a941913dfbdccfe95f9ec6e120ecdabc2a23e5e8afae8a4eca897b362988a54e
font_02_sfnt_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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