Malicious PDF — malware analysis report

Static analysis result for SHA-256 705eeb2f7b39847b…

MALICIOUS

PDF

89.8 KB Created: 2021-08-01 17:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9095620c04eb2c21f52c39f9267df8ed SHA-1: 6a8f37ff07d40d67e71c2c1c23947e1b74b5e130 SHA-256: 705eeb2f7b39847bc924d07bc8c7368ef30a2148811a4029fa0c52f3d7d62c14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate it is likely used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • 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.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/3fad0240efdb977d0fa2355040ee6317/loxudapafozaxuxogum.pdf In PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161034b537d43d---kibusagisugifaroxuz.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/200b011387adb942f06558e4dc52884a/gizivivizutixasabixog.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/85159847806.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee5f17758---rawetijufuw.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9gbd4bfgdt02vgeo6od2786nv6/76700886771.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be418e85a6a---9554781620.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/logerokabipogiralezawosel.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93d32ab351---15571116986.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/92168a3799bc21c88fe675ab52f69356/zezogegamoluvabutekisim.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/65391846246.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/13787123434.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a17f710a35a---degezibede.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/xumadejijuronu.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/7ac805f3575fec77177613b6a4716859/95625334599.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/02ca74ff4ad0ce80d6f0a788c4309c51/gevujilupide.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/vagawitoxej.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/xemavegugana.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/jugasivonuzapifufozitam.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/zemeg.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/faa3jqeu8qnfjqq83th8ir51fn/94509468410.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8c29a60e6---xapanonagiriganalivubexe.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/tifoxosimadisoneveveteb.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b975a1266cd---78245441489.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/0e821a8d8c1fd6128e8141fc8da889ca/6286043781.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=zefal+pump+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_off0000fc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 17628 bytes
SHA-256: 7765054f8d0e01061583400db88f418ddb551fea303d544409305f3e13fcacf6
font_01_sfnt_off00012a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4E 10004 bytes
SHA-256: 8b7b1c4ef9c2e6a3749fd78651b3adbd76d664bbfa412a65a3ca3fce729e71f2
font_02_sfnt_off00014076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14076 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1