Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8b2446208122fe…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 11:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2373e674db2981a44bd67657c4167733 SHA-1: 2826417e587ee95f012b662b46e3019a3b203b10 SHA-256: 6a8b2446208122fe50aac8b701a1257e99d61acd89df34449d68f7d837bbd384
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=have+faith+in+me+acoustic+chords PDF link annotation
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/955510b103088f78b233f5eb983f03b4/taregeragutulev.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d92c0e3f0---66953219977.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb5034624c---dameno.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c895ae1a962e2181de334d0112701f4/biduwitigelife.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/31e1c98925f3bae371e8e6e968f67941/xigatu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e0519b4e92d46fff829cc825a40e5c85/lakiful.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e07a8e125---5651493216.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8261a6b009---lewanakikova.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/zegolomesoxaxewonepovikum.pdfIn PDF document text
    • http://short-story.ru/upload/file/rumon.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/4409234026211145a33e8e127c46ea5e/gugawoganedotidi.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/7c00eqkbrchhqn00e4te68io6r/kamulufanejonakimidi.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/d13021f86358fc0824a33106f840c895/19924273107.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/cf58145de448d15d7a36a1410761c016/zusakekol.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef05e9db54---53403149665.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///41343437917.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7995c92a8b---34950296257.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a10a9c33ab7c0eb6597dd8b32f3d520e/piluvetujaw.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/52855885934.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/624d05972a8f17504c73961ef7257035/bafijadev.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/0lah1qte47uje8gph2tku3bk01/fidebelilexiwano.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078134013818---tabobedakusur.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1487326e---sokibejej.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_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 17188 bytes
SHA-256: afe3963396613bcd23764581ce2bca5f0e856a44a6634e06533fd4f92c4601c6
font_01_sfnt_off000119b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B8 10852 bytes
SHA-256: 5ccf102a3b1a581b9b056fa9f78eaba5180b31460501981d6e817d95543cbc34
font_02_sfnt_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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