Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc6cb8ffd881574…

MALICIOUS

PDF

107.7 KB Created: 2021-07-07 16:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15db69cfb20e9ecb6dcdd0c8703c3074 SHA-1: db3be5040aa1a475c8214b0bd48b0cf30d35a5b6 SHA-256: 0dc6cb8ffd881574e31d80809a204636f3285bc8e38c8ad45388d03fc30ae805
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary purpose appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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 https://catamma.ru/uplcv?utm_term=average+surface+roughness
    • https://o-dance.com/upload/files/nigunevexig.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/99dbd9190524432f749e2aa048557971/gititalatimujepuvedas.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cea1cbe82bf---66250969618.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f62347a6ee46cbdc309832b9ea963f90/pinugolujit.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6c1cc88466c9bc0bc7bbc2fff166d9e8/rajiv.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/e94envv28g2s1hl6eklks32din/zefupabomikuzuziwiruf.pdf
    • http://ksnjl.com/userfiles/files/ferexedaziregelanana.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ed576547---roximowa.pdf
    • http://akvari-um.ru/userfiles/file/kirixipexupesuted.pdf
    • http://lnshiyue.com/userfiles/file/20210620202629_1644556235.pdf
    • http://goldnumber.info/userfiles/file/80140222942.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711a1c058a8---ruxinolivojasoluxumeme.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607491fc5d048---90535570659.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/0971f8b01b998fc21b9f1c776499f72d/wepozekoxulipogo.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/e936791361ebb96e45f93bb973526b1f/7416948413.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607da8462632e---zolufalok.pdf
    • http://songpinhao.com/userfiles/files/zijosozujifuwiz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e95f4447c5---dogemapajufodejipuvub.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32041d9ad4---31390285498.pdf
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/walumuposaza.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/3qjihal6lrlvfbhm58omv1m151/12225803650.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606effc142161---64421919897.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a2d050ea607189660ac853a6c9308ab1/pugafizu.pdf
    • http://lso-msm.fr/userfiles/file/80611079314.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/vsbrv8k32vbpmog66gh9ra7l7j/posepolilufu.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/592512530.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3db0333ba022f54c6d6ccb2a43b5f72/37536614870.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c93.bin
dd334e625c9beff9a9a40ca7934f77e7b7d4af71a045bd74bb4ca9a1daadf2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C93 20020 bytes
font_01_sfnt_off00017117.bin
07ca5fd4d3a8aad68a9f9919eb8d3e432c4e939822edd61978c6f72997de9e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17117 10524 bytes
font_02_sfnt_off00018911.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18911 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.