Malicious PDF — malware analysis report

Static analysis result for SHA-256 6085d76269cf6fa2…

MALICIOUS

PDF

82.0 KB Created: 2021-09-20 03:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 411ba34f23853ca085d01a0518b9a1b4 SHA-1: 82e03b73e669e2efb39aaa176521803af0467c58 SHA-256: 6085d76269cf6fa26048b161d0d898db34dbe3bf555c38c2cc3c444b6039fd94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=strike+force+heroes+2+download+for+pc PDF link annotation
    • http://touchpanelpro.com/upload/files/95085309761.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/37268171694.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/87419920686.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/jeborigud.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16147310b1f804---30804407793.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/27732493553.pdfIn PDF document text
    • http://idcla.net/upload/files/newaforazevemigodemip.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/zojaga.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/fobaroluzojatipibevomus.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/digowisedifezonulujavolo.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/zubusowipedevidunemap.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/71527495545.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/89631524521.pdfIn PDF document text
    • http://live-net.it/file/wenowiwalodinelegizalugaj.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/f7e94c9f8a8b4885d252cf7c7c666675/29848429855.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/mojukateza.pdfIn PDF document text
    • http://paliukenas.lt/i/File/84068031087.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/75400832993.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/13089104896.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/pogovoz.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/378f6886bfdbfbfc9b2cfaa3af606e3b/50032784983.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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 11092 bytes
SHA-256: 5c2652e8127484237c1f9595bd060550eb1774f158911d57df85428381fb2ee4
font_01_sfnt_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD4 18264 bytes
SHA-256: 718631ff28f04ad869c0898e41222b86527cebea3e4ca4217f48eb17d56825d0