Malicious PDF — malware analysis report

Static analysis result for SHA-256 b902f0c51246b1a2…

MALICIOUS

PDF

88.1 KB Created: 2021-08-06 02:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32410ddcaed5b733e8b2671dafdcb0ce SHA-1: d71de6384badff5f7eacdcb06c9c5f9eab888f92 SHA-256: b902f0c51246b1a2f002389989090c160c1a91b616e5b2d00205ae2c74d4207b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains lures for MFA or invoice payments, directing users to click on embedded links. Several of these links point to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or harvest credentials. No scripts were extracted, but the presence of multiple suspicious URLs and the phishing lures strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://handbook.hu/upload/page/file/81909230379.pdf In PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/814e30f82759f0a29c2eca087cd0fcd6/80476148495.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/zinumoferufuj.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/13030556130.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/lomow.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa7e0e7cd3---kikevaruwumiwepituzatulus.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/q2j5n7lt85cksv6rq3pb0hedj2/14347270935.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/32321760903.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/8829064959.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/0069153eb324f3ef1d77c952663764f2/wutojanokanege.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/19597627584.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a56bde2c4---winekigakaxanunefujo.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/1869009073.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/22435156974.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/737jagtuestlnnu86jlqbkp33e/pomimipopemekibit.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/b90e71161215eb5a991591e5a26b4c10/38944171187.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/67361196618.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7j1oj4uj5nvq5bh602uv7ffke1/voririnenejesizavedoba.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/wegujimodalozodosubimadaf.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/40123480918.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66675f2cf---norikuvonidagejipuje.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/66907100585.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///bikujoximowewuwulegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+download+my+aadhar+card+without+otpPDF link annotation
    • 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_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CED 17096 bytes
SHA-256: 6e1b1864cc0af60a105250ce825ce9ffb56300cadf35e998c5b8fe5d174d2fa5
font_02_sfnt_off00013920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13920 10772 bytes
SHA-256: f2a6221b5f841920bf1bbb28e87d1a4556f62611aeda9954713e2a00423af1bf

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