Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c44297d459c264…

MALICIOUS

PDF

105.9 KB Created: 2021-07-05 06:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0312752d38fc06285ccf12fa293779dd SHA-1: 3b5370b8a37e595e8a771e4002257b299624b225 SHA-256: 32c44297d459c2640bb9bf62a77cb737ac8fdf81be3574744acf0a2d5e69c4b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, do not directly reveal the final payload, but the overall structure points to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02d43a2184---22886020730.pdf In PDF document text
    • http://seoulgreeter.com/userData/board/file/silugotukevuk.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/08c8443bdda902246793d27594842c9d/7116759338.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/oaa57ps3el12hgkc7e00m3jars/57596864782.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a386c7b89e8---kusorulebaredug.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/41258822758.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/79205737257.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/64536897707.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073e3b688342---12085131306.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/xezudizovizajibatanasiniw.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef86cdf200---41816095776.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/7efa41277351d99d1970e15d9151eafe/32266614088.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1e70e7e1b---17329267390.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/rusigividotavopimuzumeti.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/dazox.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/tumisitafemesapu.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210626164543300.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/medijupebewetajuderel.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/xevozu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a62d15b19aa---zudexebejabutas.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5ae32c0edd571e4be46a0b548ed01871/wepenopegomovonifa.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ntit4rau34smgvr93vdbkhps2b/59343151348.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/69366005188.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/gazibofejufurutebuj.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/80ea7c42cf8eb0b891f4dce40200c654/56601635303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=communication+barriers+overcomePDF 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_off00013c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C98 17100 bytes
SHA-256: 5f82ecb3c4929eab605d439b5e70ef904edc01a0a63a1651de90d73e41891567
font_01_sfnt_off0001694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18161 10684 bytes
SHA-256: e8ec42473fa5072ffe2bf587a248528a423ff4a930ac182fa4db6ab4d96f9a8c

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