Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc2831300066db5…

MALICIOUS

PDF

96.9 KB Created: 2021-08-04 21:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 3bedd83d4dbc347e2faafab28abf7b2b SHA-1: 801f30ca02e41fd6284599e079d5b2a138c031d5 SHA-256: 9dc2831300066db5fb861c3d9a1a555b9c06f9be8dc9054440db42908201ca7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://garglob.ru/uplcv?utm_term=hhd+48+egg+incubator+manual+pdf PDF link annotation
    • http://nhatminhtrading.vn/app/webroot/uploads/files/39180108698.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6f3e3b30c---demeluwomefadit.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/fugokojogutezemaguvek.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/fifodaroninif.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/polasovupufemurav.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/heejgs1s0a14dm8iu3k5idra2a/44545392650.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/radusigofejewulizuri.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/gozufinufiwukudif.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/59c5d9dd281ae9d44b600472edf45657/6809057303.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f43e6e54784---69914568592.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afd542d253---sefakixefurinizem.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/faxigenevabudi.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/4386097596.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/desorararopidekap.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/danuvozuxakir.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dff85164cf---78727513098.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecab8a0222---97941157695.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/85202065954.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc58b2b5544---87627495064.pdfIn PDF document text
    • https://wonkingchina.com/d/files/jikilezifepiguvimesebi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/cc6ef5734375dad5f64ffa8070f1ea78/36517657234.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160df7c5aacd2d---xobini.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hj296dgaucctl7lghpqrt3ueu5/zapalorowirexaxu.pdfIn PDF document text
    • 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_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 18832 bytes
SHA-256: 63eb173a009376d912429670bcdd1c7dad9e853f2b55151e1ea6a05c2acbdfdf
font_01_sfnt_off00014388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14388 11416 bytes
SHA-256: 7078fb11635a4cbcbbc915d780b41c3860709562dcc6b12b98a4ba4bde052a27
font_02_sfnt_off00015dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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