Malicious PDF — malware analysis report

Static analysis result for SHA-256 411de166809eb4ff…

MALICIOUS

PDF

84.8 KB Created: 2021-07-01 15:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9fd95fd6a11a0b4ecb56455c4212f71 SHA-1: 8d32a8b0e77248a44e3f28d893fbb8320e0759b4 SHA-256: 411de166809eb4ffa2e244c6a5b81a300244e0a42df012a06c5d72f741ee231f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=magnetic+stainless+steel+scrap+price
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844b2fc0891---78317505995.pdf
    • http://candybeauty.vn/upload/files/24798882269.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/3f90d07cf1b7184f5840862b063d8844/78846222841.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/rodi1uh9pc3i2oh8l63tr631hd/nalavakitojuzi.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c62ec1988e20b4ba90d764ee92290a58/35332708950.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b35bf2909a---devupuwefevabaw.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/eaa32fa839d9199a1d6f861f92b75a17/supaveb.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/r3u68kpa80bb1nsbcftbuvj79k/vozomepewozelirifibosozix.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083e36bda807---zigejuzoke.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b22da29c150e58fc16a64a3b5a0008a3/jewuwivuxejutojalix.pdf
    • http://konsultacjenaukowe.eu/Upload/file/zozelenozegabagivu.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d669f89f2ee---kawupakilifa.pdf
    • https://gites-les-bardots.com/userfiles/file/90152463500.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90f8aab96a---96189932167.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/l9e93st9s0rhmt8s0vth7db9tr/89440484189.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b41670a33---55912375064.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/no1338q6onu9dskbmfdfvl5ij3/zosamukazapopeboworu.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/90997408386cb396c52061859f335d32/25759638213.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n1bmk0v6rg8le07c5qdemge07q/62006689232.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608339a85d558---23606774224.pdf
    • http://paletydozahrady.cz/ckfinder/userfiles/files/komogesakilomulo.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/10165675316.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_off0000e88f.bin
f4a0d2a9137f39f06714122ff84752a68b6c6b1234b56ffa86ddfee7a0a3856f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 17552 bytes
font_01_sfnt_off0001162e.bin
692fbbfd3c59ef42d3d406ed3c88cb5dfbcfd5dcecf18791684f1e27ada1f4c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 10424 bytes
font_02_sfnt_off00012dec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 16792 bytes