Malicious PDF — malware analysis report

Static analysis result for SHA-256 32730ec3a914d3d9…

MALICIOUS

PDF

74.4 KB Created: 2021-09-01 22:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0884067c8a09e3ebbcf35ea38d28bba8 SHA-1: ac4d6ff45c60f51e949d91a93cbe70e2f708fca6 SHA-256: 32730ec3a914d3d9d1991b7d1ac352af0687f93060f0e60d1ea07ed269ee594e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986bc25e7a---pobatogujex.pdf In PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/89484432349.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607039383f98c---24826405139.pdfIn PDF document text
    • http://aimic.com/userfiles/file/wivakurukurefevitosovi.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/47099735074.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f9087a528---36637384226.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4f88b46348c9228c3fd8604ce8571615/19525849976.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/36214270128.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/mizatasemejesizaliram.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/3a313e11c26c95c44eaacca71dac3d8f/dotezagil.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/ziwilemirutaka.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/bumuxerigetaloxomar.pdfIn PDF document text
    • https://maintogelonline2.org/contents//files/31511418540.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/57612894421.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/bhj6cn724ie3647m8977gmfkm2/67497247952.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/22638481644.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/aa133e8b959aa957a793db9690547de8/xekeberoruzofabomo.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6918d1045---52590275691.pdfIn PDF document text
    • https://actor-conseil.com/files/file/61368887778.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b9eced8a910ec03661add2306320ce4d/25586633315.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/80458039063.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/60960098387.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/ea9a6c1f36334956d4725686b4206831/nopit.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/56577429877.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/meleputuwosas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+skylark+by+christina+rossetti+questions+and+answersPDF 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_off0000bdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D0 17040 bytes
SHA-256: a3e954873b90d13d9f134862d90b4ca0ff3234fa038ce184d67714701b95e65e
font_02_sfnt_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 11108 bytes
SHA-256: 8168ac70260b4b2ece140d09f1cc84e63e9ce2c67d62cd995e6f7c4014dd42eb