Malicious PDF — malware analysis report

Static analysis result for SHA-256 30935c491bf6659c…

MALICIOUS

PDF

111.4 KB Created: 2021-06-27 22:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f4034c2ba70631f35955617b38475376 SHA-1: 3a1a28ee6542112aca66a3e5d5051e22943810b6 SHA-256: 30935c491bf6659c97c0377cee656a425f2d3fb61e74d290a734df4f751a07fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/lu4ekq6dofn79j5dno3b58ukv3/simefasaxarunoliwebomabit.pdf In PDF document text
    • https://diedacorporation.net/freesiafiles/file/tobusug.pdfIn PDF document text
    • http://usmleworkout.com/files/file/gofixapidawepobo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb85615687---zepeb.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160967d4050391---falotawozuwibiwap.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/34000862453.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f091d1c327---xutudoputagowofabisepuxa.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608219a331a69---pirikirotozi.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9eeedffc9---zusavadimevotikigivufuf.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t32dk59uiegfi09g220f2ftoqs/25071592512.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/a84e724488b5b568180189aaaae1b2d4/logaputogufobijekegesi.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d231fe90f04---savalamigabelagemanev.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc844f21a---85239316200.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/49418443783.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1f85a628d0939c9d5893e62e02c35fe9/puwuwenexemoko.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/fb81bb041ca4f5968e5bc39b244b6555/mogokor.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/eb1068c248b0756060a2d6257037d1b0/fevonixijofipebawe.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4dfa4e897af3a10b699dcb977f3fde7b/sozebisuxifatej.pdfIn PDF document text
    • http://jucal.es/images/file/domusamasegosonukugi.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lhemtlr9g2kccrc6q0s6dsdo2v/91314391540.pdfIn PDF document text
    • https://irantruck.ir/data/file/18799012955.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/42406148014.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/9770859802.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/24830427166.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf9a9efb9---migudikarug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ap+language+and+composition+textbook+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_off00014f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6A 17936 bytes
SHA-256: 786d1c022c539c1335608316940ce3ee14abd4c361e511fcfe60ddf730c51eb1
font_01_sfnt_off00017e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E13 11276 bytes
SHA-256: 77d63eba024b846221f87495950e2613a3260171a90b683c7a6f9574ed229739
font_02_sfnt_off0001982c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1982C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1