Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ebaadfb67715b3…

MALICIOUS

PDF

87.1 KB Created: 2021-07-05 09:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e3186a58ed959876b200759121d6a8e SHA-1: 78b5311085e9361b89ef0c84447debcd00e8b0d6 SHA-256: 80ebaadfb67715b3bdd9b0fc34d478e3f69bc273825146f49532fb53c544442e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be part of a link farm, hosted on various domains, some of which are associated with compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous external links suggest it's designed to lure users to malicious sites.

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 http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7898ae06---81527094738.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607108dab6820---16207762065.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a444fcdf4d851d2ce5ab710cfcf76672/kefimoso.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080456510dc5---63503190838.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/xupamevatosenikuviwufun.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba21422e05b---44688399222.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/98550582385.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a1325f84e5cc633d42edea3a0dc71b39/3225643635.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/rixerimojawazexuz.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/88920222186.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624692412.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/657ef5e378cd43aed94a3a4835e2ffd0/68937366029.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/dudonubijexigafarijafe.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/p71a75nct4ca44ne5k0fvj63v2/pijenu.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/622bd1231e69fe06de61671583deef68/89871117158.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a16517af472---soguvorizigunuboviladeja.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/71327301315.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5b7af548---ruruwasijazupuku.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/38818441815.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3c989ca6ad7824449f15df04886ffb64/9620297458.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/38645602489.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/21202d5f3cef490bbb9503ecb7bc3cb2/rokusinolawato.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea8992668---70348604397.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/90889828424.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afce8ea2dee---jowenazigagozopoxibatedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wrentham+outlet+mall+storesPDF link annotation
    • 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_off0000f25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 17524 bytes
SHA-256: db8fc5e5e6a69aded3ebff3639bd6f95ade02c9ba52292154441acf1b75ad092
font_01_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 10376 bytes
SHA-256: ac8bb7bf6baf9333d0d16d92e9fc9b0d6db3c5865d3113ac3092f07531a397bc
font_02_sfnt_off0001370b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1