Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0e6feba87dd9e2…

MALICIOUS

PDF

90.1 KB Created: 2021-08-17 19:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 352f4cc37cc2773f7a64b782044e0963 SHA-1: 2b642a5aa541bf885a8ca6bdaca8e5416e518b84 SHA-256: fd0e6feba87dd9e22117ddf4453c4775f5aed9c150e4aa8967ef8de864ec9375
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/zevuziledobafatigepu.pdf In PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a3c63184cf27c2ff709bc0726b082f6f/wepedoladabe.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/10664134507.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/gewuvejubid.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/lepud.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/blm32imo5p5qgre4nfrghnec2d/74308237820.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/12887356036.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/jazerupexexuluzu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f800c2d90b---1476329328.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/36079515776.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/jodopadatidikupukux.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/befikajuxumo.pdfIn PDF document text
    • http://myslizdrave.com/soubory/94850276860.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9068e1702---89518444318.pdfIn PDF document text
    • http://mlead.net/images/e/file/zumikawirig.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/tubegukug.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7fe14aaa---57175820805.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa527c5aaf---52551518419.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4f2ae291---62725475023.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/zalupigubusanej.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/jenuketugutipevanu.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/vumokizevubuwozeg.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/599cb2b39fa481ae6abe1045687625cc/palidat.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/xejusibobeviwokumovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=autocad+3d+commands+with+examples+pdf+in+hindiPDF 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_off0000f78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78C 11224 bytes
SHA-256: 9fbf91f724f51250448d1881456b9e1d8673450d981432363ee1f994f227e65c
font_01_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DF 18152 bytes
SHA-256: 3ceb18b67d8f5b8532b4d1addee1aeecb97033bbe3619f382855cca7f9cd5973