Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3429dc259eae8b…

MALICIOUS

PDF

86.0 KB Created: 2021-09-18 18:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: acaff474520aab56724d42597206cb01 SHA-1: c3c33c173a060b4be037edecab889a3c2d77c6f9 SHA-256: 1e3429dc259eae8bea25eb516620b4af73ecb409a16bf37ba5b9416b095b0070
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=4k+camera+filmmaker+pro+apk+mod PDF link annotation
    • https://huanghecables.com/d/files/8701747221.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/70583456385.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614241ec4a0cb---dizuxajukikegodewavekifes.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/gavimatamiroputojasowa.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/supobupixujuvu.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/vunegipabepoj.pdfIn PDF document text
    • http://sentai.cc/data/file/20210916_034320_145.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373c49aa13b---mimukufatuzavonu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613a74ec6e57d---44945316307.pdfPDF link annotation
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/d748303a0b8ad6bdc15cd55340c85ba2/kaxeva.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/39241112157.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/kevojevoseveto.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/12472798025.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/sasagilapotonadojisetafi.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/gepopusugebaturekudewatej.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/tavasosibufatokanedoke.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/xiniluwis.pdfIn PDF document text
    • https://digireg.dk/upload/95805371866.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/fudegedabolunaguxamowofu.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210902110428_c3ropl.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/28777129383.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/lozudakorokufiliguno.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/69819188062.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/senutijijuf.pdfIn PDF document text
    • https://successalpha.team/upload/files/boxosuzidevuferabotus.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/85213492877.pdfIn PDF document text
    • 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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 10484 bytes
SHA-256: 337c41138de3023548cef51c0fd7caa0a053ea0a1479f0b931bf11ab84903d0d
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11673 19396 bytes
SHA-256: c4146e29d4af9e9406282d44c099d6cda603c3dd7972a38e8484d4f5c7b39542

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