Malicious PDF — malware analysis report

Static analysis result for SHA-256 0606c6a54f4de68c…

MALICIOUS

PDF

84.9 KB Created: 2021-10-05 23:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c25533da22f54b7fa6623ff55aef6488 SHA-1: 37e3a3e546265852195ba40d1a5e691cf937739e SHA-256: 0606c6a54f4de68ca25cf4ebba24c4a796d5ff1faba5a63a1c97f6db99eaaafd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external websites, some of which are hosted on compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/9r1pdnjb8gqiihki1dlt07porp/bufapulitipenan.pdf In PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16158f867f0eb8---97360673064.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/59222769533.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/wuramigekosajigiluvowopo.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140aa6b7e1f8---17539599972.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/fesipasus.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/3722114411.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/87044378414.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/xitemuvilodijugadotu.pdfIn PDF document text
    • https://wita.lt/images/files/buvutuzadomaporigotovujex.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/zodasilagojubuko.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/gujosal.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/33428018443.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/jijusixuni.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/68535419389.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/19949058258.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/76419886443.pdfIn PDF document text
    • https://rm-parketi.si/uploads/kidotusabemerow.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/61526185039.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/43088782725.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/60800094947.pdfIn PDF document text
    • https://mollis.rs/files/tipifuginoza.pdfIn PDF document text
    • http://agro-partner.com/Image/files/53552666667.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/65918696307.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7d3bbcabf---21586568984.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/fukizebamozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=god+of+egypt+full+movie+in+tamil+dubbed+download+720p+onlinePDF 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_off0000db57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 11408 bytes
SHA-256: 9e48f512b854cfcfd5003b6842229bab5bd3b84afbd4455a36d8dbe5b783bb66
font_02_sfnt_off00010e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E19 21420 bytes
SHA-256: 7179cbee5522180abf51f04ee171b4379b251e2df714879521f33e9fdff91e3f

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