Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd620a7c7f973ff…

MALICIOUS

PDF

98.7 KB Created: 2021-09-03 13:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f605f86758647c1c4171272eb325c4c SHA-1: 45c9669bcec985d4fefb9ed751cafb197bc163c0 SHA-256: 2bd620a7c7f973ff95695507bf22e17f54de07cf5d8415fe4895dc5719469026
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of a 'download button' lure further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.conkite.com/wp-content/plugins/super-forms/uploads/php/files/db9f54b6a60a7a0c69df475373516b5f/jafowineritupakezugufip.pdf In PDF document text
    • https://northwestconvention.cz/data/files/69917812385.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9221b37217---56215690863.pdfIn PDF document text
    • https://adikkedua.com/contents//files/69876860038.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/52337151698.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a8f9124c3---faxuboxifoligatezi.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/kiwapepeminirimexajexa.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/3dcb470c600e87ddaa6a182f5029f7f2/xolefaduwe.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc7f3a8bd---nanevawavalimiv.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff63e23867---nujopaxuxibesovozevibo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bbedde6ae45---notavesujarodefol.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/33144993273.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc49dec9594---segijutijaxawejerokogere.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/83607980011.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/62706236923.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/pawajo.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/xokoz.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/wigikoganof.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/biwidutelanitanodaw.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c77db8a9c---vojizoz.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d2401a967e8e7c9e78048da4eeca03c6/82493440507.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731efa9bf2b---66512379120.pdfIn PDF document text
    • http://beiwendq.com/data/attachment/file/79535657586.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/jifeda.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607120431fd5d---45641695850.pdfIn PDF document text
    • https://eurotig.ro/file/bikoragipidusu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/k3und4el59jvdd6hkfdouog29n/mepasamutolomik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=rules+and+regulations+of+kabaddi+pdfPDF 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_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 11048 bytes
SHA-256: c342f67a68dd97522fdaadaf23985ac9d7394a70d63abbbf4bc4aef587d59082
font_01_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 19804 bytes
SHA-256: 5ed1beccd5de91affebae579c8c4f6f7f9b965b20a4581ed8e9a4aecaac91282
font_02_sfnt_off000164dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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