Malicious PDF — malware analysis report

Static analysis result for SHA-256 af14b73989a2bd29…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 05:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e86da5d1a7d31524c58ea0e611fa62d4 SHA-1: 883433130920829bb4047611d32a37b34747d0ed SHA-256: af14b73989a2bd2901a4981f6cf0b0ec01ff7290729f3b1ee1331372874944ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. This suggests the document is designed to redirect users to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140b03cb52---1560154312.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/6abedaed800931957544ed36d8e60991/43820099095.pdf
    • https://fotofidelity.cz/userfiles/file/pedagapasa.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ukq8kbjcfnjssqsqj5ne0g1a4/12744964113.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/d80e2b42a512396cbf20e7585242e593/55906276151.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d8ce962afbc5466ba26975fafc5ed425/ditunob.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8c7a5e9f73d66b59af30037d7b5d43d6/26461692357.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ed55069ed---20398153817.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4g0hdjdam2hjj60ip1pjm90eto/35095150976.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/tuxagevakijunukogemuri.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/8e1a4397119b2c921d89d194b69214c6/fobipid.pdf
    • http://archinfo.ru/uploads/file/50078187054.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b4a781c4f3fd07e66ae6aae56606980c/tetol.pdf
    • http://sahrugs.com/userfiles/file/xatanunopuxe.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb568d0743---bavuwuwibikinegur.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/b53b5a96997176e22b847a0cd344cc5e/zusotarerodirij.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/o9okdkr3v8tal694qiugsh5jt0/56927438725.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89e926e23---34139456440.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e796646518da1e1e8a060142d790124e/69022348717.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084671f84575---95935795333.pdf
    • http://pitin-akutsu.com/js/upload/files/juvopipuditokudusap.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e98b4dd81b---16650555238.pdf
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/9873221699.pdf
    • http://wawabed.pl/uploads/userfiles/file/45144815645.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=adding+subtracting+mixed+numbers+worksheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d301.bin
384bab3b930fe765e0b21fc8a3748a79378eda6704abfadbdf9336b11362884a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 16740 bytes
font_01_sfnt_off0000fe63.bin
2e9af808339ff1bdbdd40c033191eaeb31aa7491ef5e116b5622a5fa55cf8b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 11272 bytes
font_02_sfnt_off00011897.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 16792 bytes