Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d8efc7ce7ac993…

MALICIOUS

PDF

81.0 KB Created: 2021-08-24 03:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00a7fe628fbbfd470e1b001e01b13a93 SHA-1: d7d8abfa7a7bee48d0b45e5bd8b51d2e1037561b SHA-256: 30d8efc7ce7ac9934649069407d87be9817c7f23eb15a05525e24f7bcc423b10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely attempting to trick users into downloading a game or other software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://xsteelstock.com/d/files/guvowibilaneful.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/72221a77f66ef7137e25af222f29b72f/begitinodowijazixewejelej.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/623299d62f1f15c28be7a5db529e0e4c/80670103706.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/wajulenatuliro.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0674b5f528---sutafuduwitija.pdf
    • http://usaoxin.com/userfiles/2021-7/file/7420946105.pdf
    • https://autosaloncenter.com/uploads/file/20279583943.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc70beef2a---jumag.pdf
    • http://cungcapbaoduongcuanhatban.com/upload/files/86643789456.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/fo7o2h1f5fdr48687avdt0tl4o/pesujetoxuse.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/josonepivamuduwa.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00ab5b1bf6---38544737781.pdf
    • http://www.logomarcanet.com/userfiles/file/josalef.pdf
    • http://grafosaleservice.cz/images/fck_editor/file/8906055198.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c37db0f5c881bccf78dc31e2bcab5dbc/5477729512.pdf
    • http://oodow.cn/upload/file/210626204333568291sz9ounmjba7p.pdf
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/pebasudonu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/dfd0c0a54a878f7ae67d5f5a6a2ac2bc/12277528251.pdf
    • http://dogninja.com/userfiles/files/domusotapilelonitelokadan.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084650e33a86---16426198559.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607849539a2a2.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/36152980765.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+game+download+for+android
    • 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_off0000daca.bin
1157399aa02f014384de38135e348a0df475412ffaedd28a2053995342c237a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 16624 bytes
font_01_sfnt_off000105e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 16792 bytes
font_02_sfnt_off00011dfd.bin
998dc53276316ea7306f5b3c136b997a10fdf470275356a3c0c31e6809885a02
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 10788 bytes