Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2080a969085fb9f…

MALICIOUS

PDF

85.6 KB Created: 2021-07-02 00:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7420157bcccdef47297d8c778ca1a2ed SHA-1: 0d818cfd24eac46e86d826edfb655b58bfbd6c21 SHA-256: c2080a969085fb9fedfaf744afffdd372f0e55b9cd9ff50156c2e3a8a5459aa1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=hollow+knight+where+to+get+double+jump
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/f9e96a40068f18e79b57baa70a3ec104/7665757151.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607753f44915c---wexapumapabudowebuwujilud.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608539fec664f---8079383871.pdf
    • https://autosaloncenter.com/uploads/file/81301131070.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7ef80a171c8e61be0667dfdbbfb4f1b5/58440198383.pdf
    • https://numen-wow.com/userfiles/cloud//files/xulurogefarebos.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/14cfba19e9c99db4d0ec12c510d72070/xujagarox.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/34fe54636bd6693ba3638fe4cbd9286c/funofisoteloluxapapo.pdf
    • http://dientrotiendathc.com/media/ftp/file/padibolafomak.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f92615386---toxipelefadowuvigeba.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84b393000b---dezivafoxenekoniwaxe.pdf
    • https://uleshuzataruhaz.hu/files/file/vapokukatomimigefakesebe.pdf
    • https://tortugafilms.ca/adminfiles/file/98896085985.pdf
    • http://vipnjl.com/userfiles/files/jivawowalodupamabo.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160993a74832aa---92221118694.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/77c25845256e8e7860b3ac603906edea/13140730487.pdf
    • https://alarouba.com/ckfinder/userfiles/files/netepuzoganejaxavaw.pdf
    • https://people11people.gr/uploads/File/rodopezoleminaz.pdf
    • http://bright-inter.com/file_media/file_image/file/5582059723.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/27a4f4c2574a0f846b0d6927b2a4be86/kexonujezolexivunir.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce57c32d40---boxamogunazedug.pdf
    • http://blpest.com/UserFiles/file/39117301620.pdf
    • https://contabil-fiscal.ro/mm/file/jivamunefunizinajegi.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/snm7biss6sjbar7d34tabb39n8/wobamolakebelujopopevega.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/11be1e101fdd1e5d4c05feac3e7ee65f/sifexesiduz.pdf
    • 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_off0000ec12.bin
7fc92abd78c48961d83339063e6f99ded89fb2a0eea9d2fee969522528db8ced
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 16948 bytes
font_01_sfnt_off000117b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B1 16792 bytes
font_02_sfnt_off00012fc8.bin
53b490dba604cfe58575193f5a3f0ea5f2a0baa6833421b0d3fa12c75b6555ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 11048 bytes