Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ec796ac36af269…

MALICIOUS

PDF

106.7 KB Created: 2021-07-03 14:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c195734e081705fabf8e254aef60cd23 SHA-1: 14086a4e86659b03d0872f52ef4e0ad5f34a1b72 SHA-256: e1ec796ac36af269aaa4876c787a90a4e4370c899fe4c8ec936ac2e1ffa75a00
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs point to a common tactic of using compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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://drafthe.ru/uplcv?utm_term=strongest+solar+flare PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9630at8u1kuqbr807dlu010pk0/xutagelerexixugiwivoxegi.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4496aa3c40e32af40a1b287dfdf7d99d/43553626620.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/69b0d71621da9a507fbef1cafc89737f/15124828671.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608746131ccf5---rezusevurog.pdfIn PDF document text
    • http://groupkaishan.com/d/files/40257715886.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/85103802057.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2837733d97---mafopumuzisofakosixilu.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/o7gn5rih77fp20a1nr9hmbnbb6/nisidifikizazazolufo.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/fetidovobuzodamafezegot.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/difis.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/45424348876.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/gler05h3egjuaa4klg0kfp4o59/dopegika.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0dbf179e6---20218214424.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/512e5917dad1a4656eb968593f68fe02/vanafelipoparofaliva.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809f039b379---51970502234.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a03ace0f6---15085855142.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd9d3e907---mujevebemajine.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/rofoli.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608310050a028---31720153733.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61c2976159---tajeluvosugexakonuzatotu.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d99729ece---82341157359.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/71619036405.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/vifedodepuzuleselog.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aed2d99f9f7---68237140303.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/490cb1871fde0bd69fb4086b3deb0d73/misedetebidemurewufokiro.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942bdb64bcc---rimadokefejuruligezufase.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_off00013bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBC 19380 bytes
SHA-256: f46e064f695b8c4e785ae8bf109324d7e25820767eb340d9fb2f8099a06bac8b
font_01_sfnt_off00016dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD4 10372 bytes
SHA-256: f2f9af90bf20ff4d18313019af9999edfd1193d8e7ce417eb7e9fecfffe0802f
font_02_sfnt_off0001856d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1856D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1