Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e24744eeaa60370…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 09:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b8a62bbbd8feb47fd90b0eafeb158e81 SHA-1: 5fc07ee81f66b63ebc92c613523b2259ff4713e9 SHA-256: 1e24744eeaa60370069a7f35cbe2bced71216324f529efc9185580c376de3880
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple links on disposable or compromised hosting indicates an attempt to distribute malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081088282047---43345196484.pdf In PDF document text
    • https://atraba-holding.com/userfiles/file/deliradamesomajajufu.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/5180668673.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acad99dcf9---30959710327.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091c25071c54---8710238491.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc379f2eeb---40643222259.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/83480535031.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/cbvi9l4khd5kq3bsj3a68i260k/toruwapurafapokojidi.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1badcd85c31b86917939a98fca1a1aa9/niluwubekoratajapekazafos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43d182c7f7---vodiluxa.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/konizuze.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6df825fa6---759140718.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/e998ff2e20e60431f4e729a1082cec7f/45583374870.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a06deca64---53472520085.pdfIn PDF document text
    • https://digireg.nu/upload/pizokukogoruxupegunozaki.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/81787777466.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3gpgbjpjf56et1775tppsug7o4/kanosirewadomutovitotawo.pdfIn PDF document text
    • http://poorclarescork.ie/images/wasigibazumeb.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609629af889fa---fepesedumufef.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/dtucre8ss0dv4ptaschbsh26r4/77099450225.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/150f5744fe1cc88b1c70328a01c463af/fugoxazuw.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zugamelas.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f882aa7c4d---69201053503.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c3cc32e2c---soxinasugeriwenebijoki.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/tetuzuxagomapuderunusumug.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/4ujq8fsvb1p2t9aslqp4f4j704/bosix.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/60700211bee6df88c9acba4e0e5ae2eb/15939438134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+free+photo+editors+for+androidPDF 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_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10600 bytes
SHA-256: 1af6bfe1436cd8faf956235f3ef82ad751d9fd6825f366d2b6965be5bc4a5c76
font_02_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 16640 bytes
SHA-256: 12adea35f6a9d5e7e06bec8d4d6df8ac3d8c9b321b01f0f1937d56032ccc9eb9

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