Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c870b733282007…

MALICIOUS

PDF

76.1 KB Created: 2021-09-19 17:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63ebcea3e8ad2cbdf33548166af00a58 SHA-1: ad80cf083ea2d72a1676c30d4e546f87c76c753f SHA-256: 30c870b7332820077319313e441979ea1cb8b8b89fc88ccd94771b534c40761e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://coretry.ru/uplcv?utm_term=pacman+vulnerable+ghost PDF link annotation
    • http://pazarziraat.com/userfiles/file/48683425253.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16145183a2d6ef---35634772843.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/pivibofewexatewev.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/16495211367.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/68260847226.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467b329dd0c---fadakub.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/mifolub.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/66045679914.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/gotanefike.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471b61ab365---razolodajabulozosuleter.pdfIn PDF document text
    • http://iucecb.com/files/file/dogiwi.pdfIn PDF document text
    • https://grandegroup.net/files/vukivaxad.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/20600155787.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/nofuvuwopugisitenux.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f8bfa00dfc968494b118fe830daaddf7/wexurubojeb.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/lilidijitonusanewa.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/bazuziri.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/70740444528.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/47454041541.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210910_131445_123.pdfIn PDF document text
    • https://2acontractor.it/images/file/31866150026.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/94153431340.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/geseba.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/56160274536.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/1182837922.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_off0000c2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 17940 bytes
SHA-256: e90b99bba7b55e989e707d04a863ae8890ac73a554d7c864bbd919715e1e32db
font_01_sfnt_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AE 10892 bytes
SHA-256: 48f4015d59601ea74d0e7ccf9f0a9be0bd6cbb7a08e90ca42b6bf6cff9775b9b

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