Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2967a224addee3a…

MALICIOUS

PDF

86.6 KB Created: 2021-07-06 00:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ce15377a0a9dd0fedd408c3a3311754 SHA-1: 08fe77b5462788e92f6a7c7eeee86ce1b6fa7743 SHA-256: a2967a224addee3acda9d518ef455285c408bc2e4249bb469d3f0cd8ba46262d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://wastran.ru/uplcv?utm_term=during+and+after+synonym
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a3e7654d---6235878685.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/eff49e69a53e53b50fc8202993d49fbe/xinijufojofe.pdf
    • http://eyupsifalibitkiler.com/resimler/files/zobuxidu.pdf
    • http://guerrazzi.info/userfiles/files/93431864228.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075280280c37---50743761508.pdf
    • https://nasroglobal.com/userfiles/file/81587862916.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ev7o6nuidi0omp4bhn9btlgc7f/xusakitujesatad.pdf
    • http://infinijewelry.com/userfiles/file/fudemeserozosubudewuz.pdf
    • http://pierrevillers.fr/mairie_files/file/63234242511.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e2436b7c250bd286e0a4c5c0b5cf3be0/ladaneneni.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0f5dlu5p1j8l2r9ceeth5qm8a2/53951830813.pdf
    • http://karmand24.ir/basefile/ehotel724ir/files/64279618306.pdf
    • http://bet-balance.com/userfiles/file/3204736378.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/23db6ce84557a4d360f027b0d2d0918a/60123908562.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a3406fa8160---72918544845.pdf
    • http://agrobud.net/uploaded/file/fetiv.pdf
    • https://chinese-wall.tw/upload/files/polilafefepaxuwufumoxub.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/453c6fcec650b6367babf75fdd9e8606/lokod.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/22625685412.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/85b7989265c5f20ad12c37430659dbf8/mukaredeburagawukefitim.pdf
    • http://mindatpeace.us/uploads/files/67903385497.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ded015bf9a2---769993630.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16071228a4bb94---namizotenot.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/87821272a062f4e653a239c1cc79c7e8/zomikurumumok.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7256d14efb---gubul.pdf
    • http://aire-limpio.com/img/editor/file/96101413766.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_off0000ef59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 16792 bytes
font_01_sfnt_off0001076b.bin
d38a3bc2293af22ffb53e19697f269b5c0524c27dfc949bd98b31dfadd3a0f4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 17140 bytes
font_02_sfnt_off000133dd.bin
09dbf10e37a06f6095aa89e1a67520b22a4d35265dfffa74a2f05c7d5d013521
pdf-font-stream PDF embedded font (sfnt) at offset 0x133DD 10864 bytes