Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae3ef180d8ca7bb…

MALICIOUS

PDF

95.8 KB Created: 2021-06-25 21:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 453f77080acaca1aab1c1560db8f4cc4 SHA-1: 0e33272b3a08b14f568d400a5b89a7a69da4b306 SHA-256: 3ae3ef180d8ca7bb598daff2b9e536e84ecbeb891bfebd82e2779dee3ac2138f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of numerous links to potentially compromised sites strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/bd81579bb45fc9f28717bb560ef1c832/gubirudabezikojidejupevor.pdf In PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e81fef01f---tenijedezuvume.pdfIn PDF document text
    • http://aimic.com/userfiles/file/11428910829.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b09cb21f241---xunozepaxapoj.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ap3d9ds1uqdv0bovcc88k2tm7k/voxoporapamidak.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fbda4b807---17148196517.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/bce52fe163133304d07d3c9e9714e526/jebavurir.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/rv536g2q7g3p7p8ve1f6b8b76r/nabopazexew.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f7bd588833e52a085384b195627da116/32880981110.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda10098d8---zusekasive.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e0ac953a5---rojizixokinupagisuna.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/78268134243.pdfIn PDF document text
    • http://i-dron.cz/data/file/tuwuwexaxukasu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1eb6bcf17---zejopexipuperufebinoveni.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/tajanovif.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/3q5e747tqpk31asvpjlo3a0p1b/wewowozekanovet.pdfIn PDF document text
    • http://ubest.ru/images/file/73247357073.pdfIn PDF document text
    • https://doganagolosa.it/file/pubopazo.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf9ac89fa9---sumutikazibonuregi.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106050538082912.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/jd0d80om4go6t6lp4fv3fof9js/26697539194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=karl+and+ricky+gervaisPDF 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_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 18348 bytes
SHA-256: 3d41d1c55118680222b38f14181a8b8b6269650685fc007ebdb4c4a3ef4f24a9
font_01_sfnt_off000141ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141EC 10592 bytes
SHA-256: 154f65ad555b35df263697c23053a130543361e928e4989162907827db46f5f1
font_02_sfnt_off00015a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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