Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3068cb7a0fa7fc9…

MALICIOUS

PDF

82.9 KB Created: 2021-10-06 04:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ddf4c7e23b3bfb1b963598333f575eb SHA-1: 032ecf7bea65d21477f0694dd81f32e0aa116a3d SHA-256: b3068cb7a0fa7fc95f623c041bc2be296b43df1227616b9f69617305a46f3b29
164 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 presence of embedded JavaScript and ClamAV detection further indicates malicious intent, likely for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=year+2+word+search+printable PDF link annotation
    • http://ewtch.com/upload/files/64212773123.pdfIn PDF document text
    • http://nfc.soo.jp/file/kokumekutekividotidege.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/35036539163.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/pulefasupufivarewezipuwe.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/dogomuwubewevudanivalaza.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/fifejofiranesi.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/reninopex.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/49649297661.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/50619049594.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/tebod.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/gkuuirh4k25mv7qgr858v1rtuq/pozibonudikebo.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/wutojidiwuzoralo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16156c529b3f38---giroxegabowojus.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc828a5eb6---vegusudejona.pdfIn PDF document text
    • http://gazetavk.ru/img/file/28063733395.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/govixifinafumetegojemowu.pdfIn PDF document text
    • http://0953057778.kad.tw/kads/ckfinder/userfiles/files/sewasepexas.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16153224d786c9---58063851340.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/divusepimuwegagotaze.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/80801355228.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/javodo.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355cbd761ad---24397598292.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/fafolibimanikowawapovaj.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/puzixufixujekip.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/xikolemu.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_off0000d74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 10940 bytes
SHA-256: 54b6704e9396c8746348773d40d4e9c5741b23695e044f7c21409b06f5390f80
font_02_sfnt_off00010885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10885 20768 bytes
SHA-256: 4718152ddb9de40ef7191d604a20ecd0e8b773e14d37b7077012ed8e425c9ce9

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