Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f2565abda11fe7…

MALICIOUS

PDF

85.1 KB Created: 2021-08-14 23:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 43b29dd0acd0117a53b2c3843dd779a4 SHA-1: 3c415a0a6735495485b6c6ecb72905c5cda666b1 SHA-256: 96f2565abda11fe7e064c3a053a675ac583a2c02bb4be3da1b2263936a672543
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 platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=network+administrator+roles+and+responsibilities+pdf PDF link annotation
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/f5e74f63a7cd26fbb918089423df11a1/97328942832.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d465c39ede---mibedowesosu.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/pijenawiwowekixa.pdfIn PDF document text
    • http://dentistturkey.com/image/files/75659070345.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/kejajeboropetolerenala.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5516b568e2---dejolala.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111a91b7b573---zaxebinosuxetepib.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e8e7e6ce5---681977077.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/63395556980.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kazamamejokakelavetatig.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210702_191239_2446.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/a3b137810dce931226a77dd8fe17ccd3/89384132954.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/nopiramaminodot.pdfIn PDF document text
    • https://mattress-leader.com/media/dijajidixad.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/14555731070.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3565a19e0d---29706157527.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2448a03c4588ab00597752779907ea5d/99284083441.pdfIn PDF document text
    • https://yellowstonewildlife.com/7699723146.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/69977365089.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bcecf5fc---kapedipubimupalaw.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/71326906904.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/49137810545.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/datepomez.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9042a59fd---7890898940.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_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 10952 bytes
SHA-256: 86a4c892e4f9c6e50462b09614e4c78e9d07f465806f766689a2364f3981bfad
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 17396 bytes
SHA-256: 2c659bd9c6b872b794d1c2a43c2d736b796ebe7a2c8614df14ebd75a1b0be114

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