Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e28007501e4d56…

MALICIOUS

PDF

83.3 KB Created: 2021-06-26 04:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d5208fa817a5d7320bb9eefa388b066 SHA-1: 027547f3a26f16e3d0e11d068a1c95d804c3e505 SHA-256: 29e28007501e4d56c7dd2a71682e94c48e0c3e67d701d1655fb5e8eb1bb903ee
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to compromised WordPress sites and disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://catamma.ru/uplcv?utm_term=124+cm+to+inches
    • https://dichvumayphoto.vn/webroot/img/files/lopirovebiku.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609251d7ce03a---namozexupatojana.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fde9a7bc23---96366746467.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b03e6ddcd0b---17273873647.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609821e7b74a0---11440027069.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ca36a3e27---vejowubogodunisex.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/36db283jbl3b5mgfb3biavdnud/95014942870.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/2vvifqp3i15mk1lu7ms3io6i9t/lufizekiwuguzogedesoko.pdf
    • http://cuacuondaiphuc.com/upload/files/nexifakavipuk.pdf
    • http://birnagarcollege.in/userfiles/file/72105343048.pdf
    • http://nensi.si/upload/file/61904511912.pdf
    • http://pixel-pro.ru/upload/file/sepewirabobexutajejap.pdf
    • http://detikakdeti.ru/img/file/vutudivibagaji.pdf
    • http://aivieksteslaivas.lv/userfiles/file/44824583380.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4ef41d9c1902399f4bcd205d84810ec9/bavujap.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/h631c32o286j9637ur1od9gcds/bixidofapatotoba.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a9606571535---83140282851.pdf
    • https://amursvoidom.ru/media/files/86854803206.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/q9mrroukdfpf411hr0tiv5va5l/gedofexutiso.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36a275590---ruloxolil.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b81d6dcd0e---21308074504.pdf
    • http://sportsgarten.com/editorData/file/77677682566.pdf
    • http://zabradli-znerezu.cz/userfiles/file/letexopesaribogilunupax.pdf
    • http://sl-light.ru/design/img/upload/file/7768530918.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_off0000e38d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE38D 16792 bytes
font_01_sfnt_off0000fb9f.bin
31833cfb0386974007aefadafc596d78faaaa1b7c6d31f6e673b8381b612f450
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 17404 bytes
font_02_sfnt_off00012928.bin
c8cdc2e3c8cf068bcf275217cb7d76fd758a3e126c0c641cec4fa03df7a508f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12928 10340 bytes