Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e0468a32eacb88…

MALICIOUS

PDF

88.3 KB Created: 2021-07-03 13:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e70a32444b8da0472ffae7b2ea008115 SHA-1: b816bdbb1f4c9920251213f1b550aacb10ff7095 SHA-256: 49e0468a32eacb886819ae0041890e80ae264d98aba19861451bdce9b6a4cec8
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage and other disposable hosting sites, suggesting it functions as a link farm to redirect users to potentially harmful content. The presence of embedded URLs and the 'QR code redirect lure' heuristic further support its role in directing users to external, untrusted resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://thamdinhgiadaiquang.com/img/files/munes.pdf In PDF document text
    • http://duonglaohanoi.com/userfiles/file/warilomewonowutut.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/33299857265.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/4ecb9f468b275738034f0049ac575f5b/lesefajebigojogelezas.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/kajasejodanijubexutonasuj.pdfIn PDF document text
    • http://amdind.com/userfiles/file/93414830700.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c07abdac---judipupibewivaxamif.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5a3b0f4b---78718732438.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/batiludajoduv.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8aa3b958f---bazinazubewuti.pdfIn PDF document text
    • http://cecev.com/stockages/files/92571419411.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/maxejutepaxofivuguziv.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/b1edf6f4a3f7540e4e58f0ac6ad0fd78/kusemuv.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607046a0452e8---19455698162.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec11184b9c---23300251825.pdfIn PDF document text
    • http://kasargod.net/uploads/file/79264150061.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/sagaxanetazugedilur.pdfIn PDF document text
    • https://dhesient.com/media/22740312112.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/pajokifosogo.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0606d8e06---54716972469.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/00f6ecf6c6f9da471bfbb62168e5e6ea/nupaxezulumip.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/68977456730.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/10034721c0b29fee353b34c599d18ffc/xunutusubinavanuzibaxes.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/woparabowaxumasip.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/stf62i981q6p2qjq5t8mgnm4e5/jotajux.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210603_D780556495533F5B.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=city+in+one+point+perspectivePDF 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_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 17352 bytes
SHA-256: a9b24549dbfddcddf9b8ed35c2d81d48c60ebf0c09734930e848009db0d30b23
font_01_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 10372 bytes
SHA-256: cb78ae33c108e4497d4e075571b01873676a9ed5f8fdd54cd696bb050bca2214
font_02_sfnt_off00013bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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