Malicious PDF — malware analysis report

Static analysis result for SHA-256 67993381d63fed24…

MALICIOUS

PDF

320.7 KB Created: 2021-06-26 03:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc3872d3b768d52218d3f9fbc5b6ed76 SHA-1: 318c3a6e01c8f3b9f83449d1b51ec3acdc4725e1 SHA-256: 67993381d63fed2417db42a05e0b1e0b17fcb3dde686bccb57443e0e5d39c0c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=obsessed+korean+full+movie+watch+online+eng+sub+free
    • http://3sdent.com/upload/files/pefiwimov.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kb1ee2ftc9cr6gf4umn6ce4kr4/42549684641.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/338221e77c894386d787047ca1547d79/sikolowugipezisimu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bfbe24328---paziret.pdf
    • http://splogservice.ru/content/file/43898350863.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ske5bl2pu49heck81ojq7rhk65/52971531716.pdf
    • https://amrapalispot.com/userfiles/file/47881621518.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070783ac6139---pasokuve.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3l7p1dk7oktc8htidluq3v8f8o/18232131168.pdf
    • https://ludifrance.fr/userfiles/file/witodojusole.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4ptodnlpumlkuhil3l0urm1hue/49319808899.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d086d353476---xujuvenudoperafoxu.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608eff0367142---xodevilusurivukula.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/95667a2a35d40ff1997ff2a73264fbb0/kavivoxokodo.pdf
    • http://stroisvias.ru/userfiles/file/xirelimirariji.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/crkgrvudfnkrrna5tfiobuc97h/fugajajami.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/c3l3cv2nqmdipi011ppk9mktn5/zijalu.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af0d0be7bf4---lubamuluzewunogelirij.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/biond2esv2rjubb4smbhsla5vh/pazitekimemumuradovuge.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63b3ae4783---gobikalag.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4446bcdb124318218c174d87b6d173b4/kupurajufegugefagixejuva.pdf
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429103059316019.pdf
    • http://envigest.cz/upload/file/pudixiwesuv.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/71d3b240bf799b5be713082f66434ef4/damele.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff028f27e---nupavozidujuvajilif.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/l68gsfjhmbg6p5sk4csnphtcvr/livozobixusuretu.pdf
    • https://abe-rdc.com/userfiles/file/55744700135.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000478f3.bin
a0f29a78b00c10d2b002da1bcd968c6938fc30fb9acd2adb6f49b74899beb4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x478F3 11432 bytes
font_01_sfnt_off000493a3.bin
0296f93c3d16986533427b9ae98e522ef91101e74646805b28383b1a6c9509dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x493A3 19436 bytes
font_02_sfnt_off0004c596.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C596 16792 bytes
font_03_sfnt_off0004dda3.bin
27aa5c380d0b9ec0ecf64808af6529da75625b183946ddedbbd5801b286f6775
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDA3 5720 bytes