Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db7349d7eecd4d1…

MALICIOUS

PDF

92.5 KB Created: 2021-09-19 17:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14b66abf3cc4cc29f4dd2240ff68ba83 SHA-1: 049009fe212bdf4455872cf2bd9fc871c9d09c3f SHA-256: 0db7349d7eecd4d129751011545b189578b3f2da7b44aa336c1a3c089958c7f7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS upload storage. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple external links suggests an attempt to redirect the user to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/57321114538.pdf In PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/81679138589.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/91631097184.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/46645560157.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec1f86cbe---68242466676.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1495879861613c1dffbf6d4.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/buruxokisukebexubi.pdfIn PDF document text
    • https://eventaipei.com/upload/files/10399485163.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/21193318371.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/kakuweranajukufasi.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/83625120268.pdfIn PDF document text
    • http://akademibt.com/resimler/files/jikopufuwatinepepejizewe.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/wodomaxiki.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021091005045073499.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210911225547_583433975.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/12511169979.pdfIn PDF document text
    • https://alohasafaris.com/files/wunotoxakaxekuse.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/fimese.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e13f1d1ddc---dojoponenebaj.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/wupixojerelogewiduvokije.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/lukemixovopawewexoja.pdfIn PDF document text
    • https://rjpexport.com/files/58363160937.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/259858299afb2c6084e546b6b6b86849/muzazujopugajiwu.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/fowofojilin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=now+you+see+me+3+full+movie+online+freePDF 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_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E34 17720 bytes
SHA-256: 6dbbf9fadd8f33965e2bd49457448165ea6420b047eb457d9e8af08676f8b95e
font_02_sfnt_off00014bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD7 10628 bytes
SHA-256: f3932f735035f365367ea3114a002e2da11b39528424efd6fa377a0b51cbbc6d

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