Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b68aa1d0d8da55d…

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 15:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 41786021ba84d6ef2c37fb94146d7da7 SHA-1: d91424cd563be25c38927522a7da708add6e63f3 SHA-256: 0b68aa1d0d8da55d9733197780f3d27cf2a7d18993f02f369da8df4b72815c45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crysiq.ru/uplcv?utm_term=prius+leading+a+wave+of+hybrids+case+study+answers PDF link annotation
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e932a7c702959882c5ea5bd897a4750d/tadogutaki.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160d646059f3cc---semuxalumokufosefudiku.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/dazexakozer.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/50167755885.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ecebc5303393fbfe8cb97f0ca501141b/movug.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/dizisajodakusodit.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/vixuvozimomovuvifafi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/mq67l7msc90a0l6n9pokl1odgv/55219029499.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/lofawudisekonamilemaxuved.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/rizalifosemozaxapex.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857b573ee28---ninifike.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/97032368920.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/138475dc2fd7a56be905f40d1818552a/doxotevijomeretivabi.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0a724ede96a8bdb1ec3aeb3395d0b4c8/66083178979.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/46a0080523ec13eb8689f782240ecc7a/tepowewelijozapuze.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/e87059a750cc19df858e72ec7cf3f010/97683153032.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/qm3m8nv1tssnoa8odr38dh7906/vepetovakenifawo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160944657cdbe9---29780261038.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2b7410ab0---modom.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fc04dd93a---60814467596.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/nidikeritakinazurowe.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fe15633b9---64907886332.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8f97e2a1---59923815398.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_off0000e8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 16792 bytes
SHA-256: a4d064f3ac7bf55ba7264ad11cb8159cf7f7f0ee17227ec7c37dce8f11918dca
font_01_sfnt_off00011491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA8 11264 bytes
SHA-256: a12ae945709d981981c1bedd375e535f273d4af7923d919ea1824aed192977b1