Malicious PDF — malware analysis report

Static analysis result for SHA-256 465cfefccc069e24…

MALICIOUS

PDF

89.8 KB Created: 2021-07-17 22:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 956efc177e5b6d39184d3731500e2abd SHA-1: a95a97fad4910586f878484973b5306b87b1f388 SHA-256: 465cfefccc069e24696b51e1e8fc4e74837581b996dd3d22714bd13518604e09
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16081139ac67b2---dotumojewobivonu.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f35c0eff56b258e01c010a346e60fc15/52918847384.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/c3206e9344bf5e6c0d67d731e4a557d4/fovojilurejom.pdfIn PDF document text
    • http://maidichike.com/upload/files/rabozovoganimizu.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/82384597059.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886b774b14e---36706810032.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/95937167273.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/5hb9qhcs0fk1rsoaqft784q0c0/tokudakafu.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/nunijasabibefirilex.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715f6119f3e---ximipejekemekakegebafo.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/42385299682.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/83088890660.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4d7b159d7---gaguriluzijafaleg.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/41627200316.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/77601798994.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/37237774728.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/vagijotasuxatidar.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/xopubusuke.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e9a94878b---71193189531.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a52b74b7b50---ranolufokotumipokuzawigon.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/lepatixowesetidog.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d9576de7dd9e713f603c5a200d3ceff1/xetimigumanezerewuxijur.pdfIn PDF document text
    • http://kfbi.ru/content/file/51444694721.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/lisonidevujogod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=perfect+continuous+testPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013d40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13D40 18324 bytes
SHA-256: 54a14e179e71866c2bddd18eed525b40a4784dc0b5abdd1ec350f6f83cf87b2a
font_00_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 17084 bytes
SHA-256: 5f44a165059b166ad8d1cb28a7348016ed5e56b87286f38242626c62eafa5f06
font_01_sfnt_off00010e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 10220 bytes
SHA-256: c78ab3d6852557a80b1110b3e33b1f9b467d47c71a38e66a0698158fb4093f71

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