Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96ec1dadf75b2a7…

MALICIOUS

PDF

80.3 KB Created: 2021-07-31 14:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd1cdf842fd6116a31c80fad679c2e7f SHA-1: fb4337089c15b704aec18f6c35104a73c6004746 SHA-256: e96ec1dadf75b2a73953d7316d2d1ba3e3357d55481764fb7d63d13b444209ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting it's used to distribute further malicious content or lead users to phishing pages. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/5079ff9ec59908e8041b5895af1be53a/xapopagiven.pdf
    • https://giustofiori.it/file/33089147305.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/cqk3b6h3ht7guoauqj0ivpb2c3/vakojalotudizuf.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/3n37j4hiec7mq2iljf4muu2rti/20345338721.pdf
    • http://cec-intl.ru/app/webroot/files/file/nimijunafagajujagamowod.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/melos.pdf
    • http://accessiblevehicleservices.com/userfiles/file/raraxopifaxule.pdf
    • http://sxhk365.com/uploads/file///tubulidevaxuv.pdf
    • http://josquin-capella.de/download/70485101767.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/gigimawa.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ffa8ebf89---99981236805.pdf
    • http://harekatmemuru.com/images/Media/files/dutitatofa.pdf
    • http://skiflogistics.ru/userfiles/file/nirajiku.pdf
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67750109245.pdf
    • https://faktxeber.com/resimler/files/lijetizeputixemorasol.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f1f9da62---gobeguzilas.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/o8peho6j7all08pto0slgqe5h1/butoguzulexesezixurat.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/46fbcce9ba644487c9e66ea1d8a98571/pavipizigetugezofik.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c16b7585de2acc9f8223998579042d8c/33474067629.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/mutuza.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d46da54d52---labowopogofivojagexa.pdf
    • http://nfrostov.ru/upload/files/joged.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=angulos+agudo+recto+obtuso+llano+completo
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0eb.bin
7b5875284795a063534d4659ee5621e236d09e77c1d0d7b42ccf5224fc16eb2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 10988 bytes
font_01_sfnt_off0000ea16.bin
b8ed780f1c3a80801b333b7b73f50f39d8478db7c021d203ec251dc2b8c5ab71
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 18488 bytes
font_02_sfnt_off00011959.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 16792 bytes