Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c92c5170096d14d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 15:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 489ecafdea3d5d7ace5632ca7c9bd57a SHA-1: b75e2d46d1f25605e39691133cf6611ae389f442 SHA-256: 2c92c5170096d14de83f69588b4cd6a5d7867cd3889cfea0092f801337ff9172
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=live+cricket+tv+channel+for+mobile PDF link annotation
    • https://aventura-agence.lu/userfiles/files/sivigusisifi.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/serizawikevijavunuduj.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/da6085cdc800bdb9e44c46cafae10597/vamejimizaxefonujula.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/17179fea2e36bb90302d43e0b25ce089/mexulojixejizumoriv.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/samifineta.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bba9ae40c062155ac058f8380fba444c/30546551943.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7fca2723---86667005579.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/losikosan.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/97505651312.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/nusisokagijedodijamalab.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139efdf0c621---malesiboxavo.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/tezumijinepawobe.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/tepetixa.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/77393923545.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/61121021989.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/basis.pdfIn PDF document text
    • http://ewtch.com/upload/files/66458127971.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/xitiben.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a997d2cf0---92485402747.pdfIn PDF document text
    • http://land89.com/ckupload/files/lejiburepa.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/dewolijetezumaw.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_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 18296 bytes
SHA-256: 58175aafeb36ee16543cc1dd5f7f772677142c6b7bf37ab234675e5b81aa3bd7
font_01_sfnt_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 10688 bytes
SHA-256: 61dd07fcd9c8eb35652c8ccb9c95fcccd3ef3efe9a87eccdfe916ea5596fa05c

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