Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c36ccf87be99adc…

MALICIOUS

PDF

88.0 KB Created: 2021-09-06 03:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d63cfe3c4cb28c5ab24f5222bb9e95e8 SHA-1: 7bf6570b4536cc527651e436bbb088ce96c871e1 SHA-256: 2c36ccf87be99adc93eaf42e11757d0275c46ec57b707d54cc21b47570fc899e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of multiple unknown URLs and the detection of a 'Pdf.Phishing.Trojan' family by ClamAV support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ddd77ad13f---5830363762.pdf In PDF document text
    • http://reliancefla.com/admin/images/file/87553080118.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/70649199113.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9861e349c---24247442854.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/15/file/20210615_160819_193.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609badb6256a2---ziboranomunolafagorege.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608243bcb7f3f---33868324655.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/f82i6p45mvpq3dlhcop1qtqd15/mafigenapuli.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/63902164312.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b1aabeb87---gelizabedaromeneke.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/situpuravafibezolib.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/17854549003.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/07911ef3a3b782171ac145f76de11e50/gamilegizuwupaweridiro.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/vemaseruziguw.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768cef36cca---41279372597.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/lomanokujofexepapuzurabot.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/d13942ae333f1782a172b5848723743b/83863841481.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd933f218b5---nemopoxuji.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/73003148451.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/m7jfg1thapmlnq6lafnr1n76s5/lutaluxukilaxawe.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f370686de7---satotawibufajomuguje.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/35336992769.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/5392b6c9400a7b03731cd5a2fba5adc9/wiganuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=prigogine+stengers+pdfPDF 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_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 10468 bytes
SHA-256: 16040f03b6ebc3148a970ba34b707dd51e09f31a2150d956c2b3540614d356ad
font_01_sfnt_off000107e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 19456 bytes
SHA-256: 1c03130dbfb1ae0640f76cb5089f7843ad52cc58c4baf8dd7d1f15c50f8cfa30
font_02_sfnt_off00013ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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