Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9ec9f85f74e855…

MALICIOUS

PDF

89.6 KB Created: 2021-09-07 01:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9c4d78d4de1d247fff3b7b892d852d66 SHA-1: f2b71f6c87b904bb885523e66ed76a47d4840036 SHA-256: 6d9ec9f85f74e855dc7183d5fef1b0d531210a831944ddf0d9ff0c5b79a6469f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs, including one pointing to a raw IP address, indicating a redirection or download attempt. Heuristics suggest it's a link farm on compromised CMS uploads and potentially a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54e48b271---lovifav.pdf In PDF document text
    • http://sportschoolindex.nl/images/uploads/zomedapurusal.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612170d6b157d---14414182289.pdfIn PDF document text
    • http://rcot.by/pics/files/wegoxegetalabedav.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3653bf393---63804002673.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/kozokoxaxutizituwolopi.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/83c195fcf54ade67a0e7690c90fe18e5/pajumogamavofakefile.pdfIn PDF document text
    • https://cristalensi.com/public/File/jurojil.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/jiwemanabuseve.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e23a19e75---fapen.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/lamexevereduparimofug.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096ab409cc24---xegituguvave.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4508e6f3a---gibefejapimufa.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/q5i2l3rkge37k5fhusbcv54vat/vagej.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/mexevukosono.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/60762482205.pdfPDF link annotation
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/55720701986.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/kupirexuxetewirilobiz.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/58772069258.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/49397163335.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/64216369148.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nr5lge2lstun2mogp0ot8qf536/70780159948.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fcc0b9403---10882851628.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/cae1505efe0d3f0143eb1e89c218e824/sobotijuliladomatabufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hp+envy+desktop+manualPDF 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_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 17260 bytes
SHA-256: b977e3c05e943d2fc623e73233152dea872e5b7bb3447f07098bff44e50a216f
font_02_sfnt_off00013659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13659 13764 bytes
SHA-256: 9ffd5227f8533197b1667ad301fd481c02ac2d761034df41ea42c78f6c830994