Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae0f7caab34def7…

MALICIOUS

PDF

93.7 KB Created: 2021-06-27 19:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68f118257d02dfd983208e345b4fa107 SHA-1: 8f47f256edeed7f693628f15933053d167f99339 SHA-256: 6ae0f7caab34def78888b7930897c383998fedc71abefa1ac3465e226c175c68
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it functions as a link farm to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67dea28a75---zekeka.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/aff12a1538c84d87217f35dd466c0f98/nuxowawijumoxaxusolaz.pdf
    • http://kudusde.org/resimler/files/32650646191.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c362d0aba08---poxovoxaxulidazelurenuk.pdf
    • http://gtshotel.it/images/file/giruxekopupivasobababub.pdf
    • http://seoulsquare.com/userfiles/file/90330832854.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8632399fa112bbf068f43a1a051f0f2d/6637153541.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/cofqon90dk9jo2f0q9gk3k0690/42859656261.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b398e532859996e9b12f2e2dce736412/92483585462.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160778583aeab2---relofaxiseguramabez.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086daf0922c2---perolitutitin.pdf
    • http://bearings-home.com/userfiles/file/vogafexaxuzop.pdf
    • http://dachastyle.com/userfiles/file/63998870423.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607158239768c---moboz.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l9pol6msn6bpehfjhkafpd8cv5/merotaji.pdf
    • https://gastrotest.co/ckfinder/userfiles/files/mepamozebalibewe.pdf
    • http://stolizstekla.ru/userfiles/file/20368347023.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c899f3a1d69---86659874229.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/tihl0k4jlnejt29hgku78o853q/sagem.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/41a2b208540a1352a55ef199861d7509/lejuwosavuzufusopezomu.pdf
    • http://reicar.dk/userfiles/file/munivoguwidisebelagutusi.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/511560df8f17b105679ae7b76ab44567/dewenegeruvudisidekub.pdf
    • http://fittbike.hu/files/file/83598191094.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=types+of+lvad+devices
    • 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_off00010d76.bin
cbdd1d1771fabaa26368be2ec792309fb41d1308f38b5e6bff73cf930db6d67b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D76 16884 bytes
font_01_sfnt_off000139db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139DB 16792 bytes
font_02_sfnt_off000151f2.bin
5c90c24c8c004ec45ecc7cf173848348aba063e0bb9872fa143b8635af0bb439
pdf-font-stream PDF embedded font (sfnt) at offset 0x151F2 10452 bytes