Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42f2840e08392ad…

MALICIOUS

PDF

81.7 KB Created: 2021-07-18 19:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02e3032e73c71fd13e57535d171583d2 SHA-1: 17b51e8be5da4e2f7957d8b59972f5e8968c386a SHA-256: f42f2840e08392ad25a2cbe7852849922ad01ba5b654d43847b03f2bba4b88e6
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 it likely exploits vulnerabilities or contains malicious content. The document functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS upload storage, suggesting a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific exploit or lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://getadoc.in/ckfinder/userfiles/files/mogulevokamorogajeneligu.pdf In PDF document text
    • http://allprintusa.com/admin/images/file/domevusewinuwegunimuma.pdfIn PDF document text
    • http://rayanchem.com/d/files/77893368441.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/rinarufevewev.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c396d270c54---pilapugekowixoselef.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/97613814978.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/94757698907.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/24eed55e4a0fa9d824e6f63d24c56253/99648986411.pdfIn PDF document text
    • https://brod-plovdiv.com/images/29512370377.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/8922362661.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/kixagale.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/62516152418.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/u2fah1ts35nk6q1q08bkofkvm1/40846898095.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/zeraloriburigusazi.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/89a798b53a36256250b70e8edfc0a77f/labelevebewap.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/puxorovenoteladifakebun.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/84106802947.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/67006444606.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/rutizufek.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vcqll2j575a1gnscgfapukt160/57213730189.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/9bdn7eune7sjhmkedjg3hliq6o/98886419623.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/morowekexafat.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/04l7qhh72s43d3p6nlker9sqm1/berawukavukepojol.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9de94890f3e041a094dfae3179218e59/75597292449.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/lutererojavolekig.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/gidonetexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=here+on+earth+song+lyricsPDF 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_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 10616 bytes
SHA-256: 9c20a889d2996f6f39fe4f173da2a0ec48cdf62bdaf079d9a6a65af45783cab5
font_01_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 17520 bytes
SHA-256: ef862f118252e92bf01a470f633ec358b91eb00477693b34525996927c78c2f3

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