Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6deba7c69555b5…

MALICIOUS

PDF

88.6 KB Created: 2021-08-30 03:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 16c3e0cfe2115acda0d0d31d592ecd97 SHA-1: 092fbc15ee4b68f851a37c053376a01ea3f415c9 SHA-256: 6d6deba7c69555b51072b143ee8c410c115c516e5c5882d6f94a7e291a199772
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The embedded JavaScript is likely responsible for executing the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://crabandclaw.com/uploads/files/98082928544.pdf In PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/8f83a09312edbfeac9e0cee62283d013/59355270559.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161060e0214f32---55024687346.pdfIn PDF document text
    • http://artside.org/data/temp/file/87727427070.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/43883931896.pdfIn PDF document text
    • http://jar-ted.pl/file/9077330032.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/44f0ac19dcd16663b863bb436ba83e29/borimumogalemofovu.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/zuginovo.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/24210384383.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/72208406146.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/23026156327.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210828235901.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/63sihui9bvkpq0ebgqlkrvvf15/43214701220.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/dafatodogetawakix.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/kopiwagokesiwad.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/18936608115.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ebb7e0c6---bafeliw.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/48110792258.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/41494162342.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ced227cf5---jexalofa.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2238d5313f9a1f176eab8e82500a3f48/dupujefevepojabawut.pdfIn PDF document text
    • http://airlineclassof66reunion.com/clients/c/cb/cb51827d251551eca15067b3b23580a4/File/21493885140.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3be44fa54---78094697237.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/20558747c1521409e76757be1beb8b13/tosepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+crop+png+in+illustratorPDF 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_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 10596 bytes
SHA-256: 8870f6b8075b6f518cb2584aabb69690ef94f4508fd9fc339d0cd19c8a39a4eb
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 17824 bytes
SHA-256: 62548730ab28ddaa558d4b490eb322dccd9734d19bd874b9beb65902d372377f
font_02_sfnt_off00013b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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