Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d89e1e770b928e…

MALICIOUS

PDF

76.8 KB Created: 2021-07-06 10:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ffc9dd17143cedf424a6ef05f0cf4ad1 SHA-1: 0602c8d8dada936960ab3e8d60a6a96def66f15f SHA-256: 30d89e1e770b928ec4d3390893e31f175adb0aa9f4464e2affd45d58729fe98a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The primary purpose appears to be directing users to phishing or malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://irlanc.ru/uplcv?utm_term=geez+and+ann PDF link annotation
    • http://advicetao.eu/pictures/file/60024430858.pdfIn PDF document text
    • http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/79461961351.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/mlbo7pfetr2jn74ekkgrf9f67h/pinawavawisapu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f4dee1e52a66e320a3d621cc7b94a797/wirojixamavejexaxuzakaz.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/47f0e70bccf04041dd0d7b123d3f976c/gidoxixurepava.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/zivusabuwusefanodukoka.pdfIn PDF document text
    • http://korytnica.net/data/files/73300965944.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/08ef0de17b7c71c2f824c894e5f434a8/satunuzukerujusu.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/29220289368.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/79849532384.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/283142a9bb3ead8606d4c93a53ccad25/17655164059.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2873a75b2---94683997973.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608292fdc4480---nutosowusetifuzikaz.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/83539908771.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22a3c6f3a---55923971518.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/86440005790.pdfIn PDF document text
    • http://gerocuki.hu/user/file/14388314527.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/0aa5dee7df5b9ff01cc6fac07cafeb3f/42860356587.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/0005bd407598977f6b6931ccb6629b74/mefapoxaturizuvefunat.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/54250193912.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f687e3376c---83045675855.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3orm56cg8degd3mg51a1ob852o/barusewadolavixita.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_off0000ca1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1D 17632 bytes
SHA-256: 9f9c33415f67edf2b45b8f10cd6090e460aef394553a9fb1f9533b8562cc56a6
font_01_sfnt_off0000f78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 9716 bytes
SHA-256: 94d42fac60fe0129c61944fd7dbc25e1f420b4ace3e767a2bfd1c8a9fb56de70
font_02_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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