Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf2af8ef8e3a6e7…

MALICIOUS

PDF

84.8 KB Created: 2021-09-17 15:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ae7e6db2516edaefda57dbfa4b3fc0a SHA-1: 09677274f5b577c2d2171402ea5d763c3053ebc2 SHA-256: daf2af8ef8e3a6e7e6fbb0a2c4bc76346821e25e84baa0a4c19cc67f45aea660
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://veterinariomauracotti.it/userfiles/files/84259805602.pdf In PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/99987591617.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/tigisogola.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/baxaf.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16139b65d689fe---29561483688.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jamekomuxowitodadusexof.pdfIn PDF document text
    • http://chipgene.com/image/files/20210903_081004.pdfIn PDF document text
    • http://gibisch.org/files/files/27377581422.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/ketululomalivejumelaku.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/wesebizaluv.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/timokadoperomurupumuruzo.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/gogig.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/2238746020.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea64d1de10---xinelominatekigefevumaxim.pdfIn PDF document text
    • http://arablift.net/userfiles/file/72357653535.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/be663e7ec7bd206ecf2fcea95ca41225/nirojuvulufo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6ab49c8ed---62602013281.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/52638193888.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137351a63448---47283659029.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/47209988730.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161382ebdab2db---vibebovabo.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/56275557186.pdfIn PDF document text
    • http://gestioniarmatoriali.it/43244500876.pdfIn PDF document text
    • http://skupka23.ru/upload/m/xuwuvebafimejisuwobuwedel.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/norogejejata.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/88468538962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=twd+s11+premierePDF 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_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 22468 bytes
SHA-256: a26c93b792b14e84ff7942e43689e1bd5308f5559e6b65904a25173ae3b6a98a
font_01_sfnt_off00011705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11705 10124 bytes
SHA-256: bc8669ba146a08ead072bb2af4400d6627d8d7df686e03162e7fcbaddd0fcae0
font_02_sfnt_off00012db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1