Malicious PDF — malware analysis report

Static analysis result for SHA-256 22da289d8de9d73f…

MALICIOUS

PDF

122.2 KB Created: 2021-07-07 12:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5de207af008ee5df73a4e8656566486a SHA-1: 70b07c4c4787bf62225c9f7ff78bbe44db42047b SHA-256: 22da289d8de9d73f5b51f3fb2cbbf24f65fb04d2895bce7a810843ae550a3813
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed a link farm structure within the PDF, with numerous URLs pointing to compromised WordPress sites. These links are likely designed to lure users into clicking them, potentially leading to phishing or malware downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0064

Heuristics 5

  • 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
  • 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://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16093c89c45a41---xudapezogodi.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/245afbc99d692a022f57ebb943690381/36973890803.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f2df323f03ca9083c119e8a07a5cd8e8/3826553588.pdf
    • http://robertoantoniz.com/resources/original/file/nawemese.pdf
    • https://nilsahost.com/calisma2/files/uploads/54848071458.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/7099b9d4fa8a199a8790accd47768053/pomubibaxapidaju.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160813e7f7bd1e---54994441134.pdf
    • http://multi-accueil.fr/ressource/site-image/files/didadaterekep.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfd5968b10---82131484005.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/93654b987c907670f027c792d39d8863/pebat.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/af3r96kcv5esq91and0u6sa4ou/dujigalujiparonademo.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609739bae0af8---binegegiveg.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0a904826---30370086484.pdf
    • http://annandale1963.com/clients/69704/File/rarevik.pdf
    • https://globportal.com/upload/userfiles/files/70673262521.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/bf351ac308b23e32889394414be47d39/98664040299.pdf
    • http://lnshiyue.com/userfiles/file/20210701042502_355967674.pdf
    • http://dragoniresorts.com/userfiles/41813802575.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/sqdg7dg047vuejd2b2hiv5ll47/robasamumafub.pdf
    • http://learnazia.com/fck/imagesfile/12672594724.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78140d5f4c---8739936551.pdf
    • http://baugeraeteverleih.de/benutzerdateien/junujozixurexefezezofasu.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4f6f64dcf---90312841375.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce612da4fb---ropeme.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6036d4a735---3892197182.pdf
    • https://kompaspt1.com/contents//files/romakovozit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=if+the+anions+form+hexagonal+close+packing
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016738.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16738 16792 bytes
font_01_sfnt_off00017f49.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F49 16088 bytes
font_02_sfnt_off0001947a.bin
bd7ef38c50095486f618ba242cfc6a21694028119427a85cd13e6d6cf0adcfca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1947A 19860 bytes
font_03_sfnt_off0001c9f8.bin
82afe00bdcb4a6fc7922090962da12c03fb1263d109d0eeac4f52c7c973338bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9F8 11072 bytes