Malicious PDF — malware analysis report

Static analysis result for SHA-256 680705e16821959a…

MALICIOUS

PDF

85.6 KB Created: 2021-07-01 20:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e92f63461d490ea46ac34c030858aa6 SHA-1: 5046573dee882d3bb9cb718682612d37e1e1b77c SHA-256: 680705e16821959a8b81aa4381b2b01d6f6873470b818680f8cff98f5158ace3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=parole+and+executive+clemency
    • http://alhouti.com/userfiles/file/84440285015.pdf
    • http://csc-021.com/userfiles/file/20210627174920_498g9l.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f8c3c72a---77356620931.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4e7eb3f16---75155320034.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c2daa1bd504420c3a2abc7e01c7abdea/91263807444.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160823f67d5e56---89306376181.pdf
    • https://palcev.ru/userfiles/file/55540235461.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160987f71a12e8---vanidexo.pdf
    • http://dolphinegypt.net/userfiles/file/57653915313.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7bdd64ecf---ganuga.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609261de9658a---68211755899.pdf
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88849664821.pdf
    • http://pulsarvn.com/media/ftp/file/ligutiwolisugin.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65fb4afe79---jurowifetup.pdf
    • https://aravlicraft.com/cmsCart//upload/file/10095510522.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a3e8de2ce3e81f570bfa01bb2cbd80c8/vafetabomimeked.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ffe82dab94c879d8fa4e130b1325ded5/webizuseloxalewuzifisol.pdf
    • http://mcalesterhighschool1960sreunion.com/clients/e/e6/e641a1dc2b4fc8b0483efb779338bfbd/File/bevowowutogobid.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/61atvq1232533bbeaptvlarfo5/lejejeroderid.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb0ed97631---dadodetofejabo.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/50177752890.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9637ccbfd0354549d40f27d70d28e7c1/dogetazi.pdf
    • http://sintellect.ru/Repository/file/laxelazofa.pdf
    • http://interstyle.org/content/xuploadimages/file/wimidolomobepojojuganaxe.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_off0000eac2.bin
69ad7cab2ea8ed85f26b1ca14fab4e0bc455c4b6aea6154add315c4ece00b0d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 17372 bytes
font_01_sfnt_off00011846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11846 16792 bytes
font_02_sfnt_off0001305d.bin
bf30640b89864c12700ae906ce66276298cc88b5e6f9fa0c9eb7d9b9c00da107
pdf-font-stream PDF embedded font (sfnt) at offset 0x1305D 10748 bytes