Malicious PDF — malware analysis report

Static analysis result for SHA-256 7124d3dd6c206a44…

MALICIOUS

PDF

89.2 KB Created: 2021-09-01 22:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d2f78960aed89d3b818dcdfa2f8c68da SHA-1: a6787527c458e622bdba151718a04ca938596da5 SHA-256: 7124d3dd6c206a44a3c1255bf481c63a024622ac9d4fb7edc1156e2d5f0224ad
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, specifically targeting WordPress upload directories. This indicates an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fcd3bbaa5---takokakivomufumibomisufom.pdf In PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/s16ti24pidj0bk4ptr6tu4ps61/88207016816.pdfIn PDF document text
    • http://afslab.asia/upload/files/47997887493.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/renam.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20216161447293780.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/wuxupatiwosoruwotevezurog.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/reloruzesomijirufivup.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ae074a412---vogetubukabaguk.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/78168523441.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/femobixifepanosozojikoz.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/fekafadusazijakisudaj.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/95724418019.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e676c0c645667284c11781f64061c475/80055499113.pdfIn PDF document text
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/16804162639.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/40d33bdd6b6e06ea03d48ca74628147d/remipitemuxujibuva.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110428e6f920---zikuwosinikulaxeper.pdfIn PDF document text
    • http://jar-ted.pl/file/93519347320.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/6821234922.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/b337b43d97c08ab2bf69bda310298d28/81869122599.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/tiwaladulirafigukowe.pdfIn PDF document text
    • http://dsagco.com/Upload/file/42460195785.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092404fcc8a7---dopimatapodal.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/gesebudex.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/53174589721.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/16722481105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=9th+class+guidePDF 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_off0000f77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 10496 bytes
SHA-256: a3d9b7818e69b2cdaaa9f5ee4f82ad9d29ff33ea7144ac809fef855ae97c75c8
font_01_sfnt_off00010f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4E 18120 bytes
SHA-256: 5d9b346f198e5baea07947c57acfe7decb9430d9771b243b4b25a7dd24a3fc71
font_02_sfnt_off00013ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1