Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa3fb0609fd2475…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 00:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cff0bea0eed61030b05bbd7e71da91ef SHA-1: 2439a73e691b63e20201e46023609303535b3099 SHA-256: 8fa3fb0609fd2475dbf3dd20a73ca766d0e2a9ca93cacc3d3d19bfc3ce5cbca4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://philabc.ru/uplcv?utm_term=manual+de+bienvenida+de+una+empresa+ejemplo+corto+pdf PDF link annotation
    • https://alshaabcoop.com/userfiles/file/fimozukepexorojuwavivem.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/siteruruju.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/vigabuzulirazurezorelis.pdfIn PDF document text
    • http://promador.pl/userfiles/file/puzigomif.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/wunafanejokabavajo.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/xovigelozi.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/a45bf66ebd9326911fa4529131b1aa5e/90203599826.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/0u400t228jn6qoo5ap3o65nupe/47529845278.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/fazupizakinewa.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/54187011174.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112750ed79db---dokenutetelid.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077b87a5b45c---gojusupotalamovonajin.pdfIn PDF document text
    • http://oodow.cn/upload/file/210702202128291413egj95jr52w7s.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/066ad52e08788df9a076cee6267de515/1778132356.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/165a70f1888c0e8d13482f82a88c11cc/vexurogalibat.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/lazexaxifekafaxubi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/609c8160c7e74169814268454a6d3f69/74230738521.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcacff214e1---gesewisudizumiv.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/12721434304.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a23ea94d---zenazamikunemol.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65195211448.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/6e123930cc058eb88b46b0b2121d0e77/resizivawomawasopi.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/lokazow.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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 11208 bytes
SHA-256: 63393cd0f4fb0fef08532dc759785dc92f4aa5a3e569fd544928b5e61fd9730e
font_01_sfnt_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 19980 bytes
SHA-256: ed39a48f5d8e3404e74fb766d6f05cdfdff56572c412ca3413b04074d4139d59
font_02_sfnt_off00012585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12585 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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