Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47f1f127dd24809…

MALICIOUS

PDF

86.0 KB Created: 2021-07-05 01:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26328d9747abc07de93720d7474de2f4 SHA-1: 3e2ae89cc9b18268954947fd55d599ba872abc93 SHA-256: c47f1f127dd248095b5c339b471805115bca0ae44e4b7d9b7ec32ebbcf2d28ca
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hornbill+textbook+in+english+for+class+xi
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609262265d3d8---woxodugisevotojotiv.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df09c9f661---niwudugapadupikijumipufar.pdf
    • https://marmarases.com/upload/ckfinder/files/79773475780.pdf
    • https://pypconsultores.mx/userfiles/file/mogexuzajal.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/m5j2d5v3fu7bk890l00cducbro/55334452841.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160843ad0f3b69---patufifolasegowasizosep.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/71c58d0abe9257cfe9a9e0c24ec0a35d/dasaganima.pdf
    • http://moristas.com/userfiles/files/72306981542.pdf
    • https://ikitellirezistans.com/upload/files/kogoliron.pdf
    • http://pro-group.ru/userfiles/files/17734540169.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/frhn6uiqmkpabqgvdrfdn5vt0i/32021378026.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/tq9049925ff6fgke9423gnmig2/86532338144.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/12ff8a5322a7e3a676c033bb88c957ca/vevebabojibexalimipozeni.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/42233207108.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/lql41totdus6bd6fmnf3gclba5/4234073936.pdf
    • http://www.findvoters.com/userfiles/file/3778763532.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c51577126---xogeju.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781583e6314---jatej.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c35ee3b637b---pizirewabidodadupaxodedu.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160825ba7e3dd2---29936669902.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/39516036853.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/5394550826.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607921f5a76e7---mevasodilirigig.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/btlbta2rr14tvdgvdlnfnlrqn9/40696537134.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 16792 bytes
font_01_sfnt_off0001056f.bin
8ca04b1d61808d748621dbfd8e33a64479a47d0ca45dbe71f84725143a789f76
pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 16816 bytes
font_02_sfnt_off0001312d.bin
cad9ded2cfbcaaa9e502f04e3d65bbf51d35e7bf49f4128aa811049d72b2365b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 10940 bytes