Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf5e62a3a4c2919…

MALICIOUS

PDF

96.7 KB Created: 2021-06-28 20:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 072035b5128806cd6249d68334fdfd66 SHA-1: 5c6f4555fa8a186e0e93d3798477e079fefc7e2a SHA-256: 0cf5e62a3a4c2919f747966eb1ec7faa6c008098e29ea5ff8b76a0a5751bf2c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://cructi.ru/uplcv?utm_term=broiler+production+in+nigeria+pdf PDF link annotation
    • http://coffee33.ru/archive/file/85871151209.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea77ee897e---64069734920.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/96346800811.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2b5a718d---30334936323.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2026e997c---defisi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607757e41e148---57306701291.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2b931b4db2267f1360fcbf1cd65c10f1/8022887294.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d930007e484fc33421b589542a61b4bc/bakifubofat.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5ec69356336e5199780034f32522047a/45720210073.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/kefexowufug.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a04a14aa2---69219064614.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/de33ad93da2f740894e947054ce9b82d/lasadoz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca5f2cf10---jelozivapoxuzenat.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/0memm1ua7370f0j3dd85tvhrjg/75706368416.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/11077115664.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2lh3467oh367httlgjnqa0aqu2/4821479784.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/puzufarojutanugafedun.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/wafanikujuromotesoriliw.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210618160507_381590413.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16bb4681ab---41308459125.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/65853354395.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_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 16760 bytes
SHA-256: f848276af7a5625088ec4fadbe8358f73f2f9848e91f22a38b5c644dc55553cb
font_01_sfnt_off0001452e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D45 10780 bytes
SHA-256: 3ab1d7eb5acb8c9a2e15f2bb3ff4f381eee843dadcda084c5477e53b3e590826

Open this report in the interactive analyzer, or submit your own file for analysis.