Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fadd64dfea3172…

MALICIOUS

PDF

94.9 KB Created: 2021-06-28 22:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 19de9e6691a42828cd057815e7e64f50 SHA-1: c2db93055b5938f3329e3bab4e38aa3003e4913f SHA-256: 30fadd64dfea3172028b5cba17c2bcb5813587f7df7b56c8d552f38a72690aa7
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms, with several pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and content suggest it's designed to lure users into clicking links hosted on potentially malicious or compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://drafthe.ru/uplcv?utm_term=wow+classic+alliance+druid+leveling+guide PDF link annotation
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f7a237c002a8247bd95e2e7241f767c7/67345193093.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/nubonipunifenupotugizi.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/42277502915.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/5661223410.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/85525357c6ede358108ba9acc3a270e1/bakuganele.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/loxozelumovi.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160880513be904---95477478925.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/95788371449.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/jvmekoe0bismf9822seirhmee2/vinerujomuzilevuno.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e16e541963---wadulosixamuwozunumibebi.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/81a053f0edf672cbe2a3b14c89cc8a53/pimomudop.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/i2b092js708f3jdh68k1r3q744/10603402933.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c24d05a1---74000197206.pdfIn PDF document text
    • http://praguetransfer.com/files/file/lujuvenepapepapute.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/xebeti.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafcff1167---39833952157.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c495ff1f81d---6025121432.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160918ed58675d---semagotilojageduzaxar.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/95865831821.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/48161363743.pdfIn PDF document text
    • 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_off00010f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F75 17556 bytes
SHA-256: 56cf52b6c968fe3be6d0286c87077d68789398e6f3e3306d1af37484adacf476
font_01_sfnt_off00013d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9A 10692 bytes
SHA-256: e5ae44c4860e73d11458e9686a136785c7428dbb234f557b190e8d8d424d2fd1
font_02_sfnt_off00015613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1