Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be1f58d3ed9b59c…

MALICIOUS

PDF

83.6 KB Created: 2021-06-28 22:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c4719ddfb206851778406dd6208e01a7 SHA-1: a0a2959e5ed48f880ca8c762bf0107471663e7c5 SHA-256: 2be1f58d3ed9b59c61c78da5a1399a7db4ed1d21964d2bbcb05fec33977f3e8a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=free+download+assassin%27s+creed+identity+for+android PDF link annotation
    • https://ratsimae.eemedia/contents/file/53867641141.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/75182187188.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/71290547687.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/13813146445.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24042a6350---tetepegojoseramoxe.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/435702fd614cb818d2d9603e0ddee5f6/rolejetuga.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/nenazikerejezemabekidob.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/27735642266.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/rowosezomimalozak.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/9d613228267ca1c1be8d67b313c80ab0/patepifufawejop.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/75897796952.pdfIn PDF document text
    • https://tadimtursu.com/image/files/fusarazilabuvegib.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/jivedipotoxona.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/k1l4ic2nob5gtjsdgcgnv13dfa/55600123880.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/5a08047667adb16a3144e79fef9346c4/raxug.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b189919252---tirosumevej.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/suburanabeg.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/bdh1gc79j6le46s1th6dl19qb1/wuragaven.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/672cdc48294be8cb5f5619309ceb44d8/23012495084.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab588c8005---83885129069.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2388d2bd18---17462693538.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607995e76bb11---66980416097.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f769ad9c0c---67355413081.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210617054653.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/82681975130.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/96f40246052057d9394745e1f4fa1109/77827369060.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_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 10680 bytes
SHA-256: 493b2cfda6d5779f389edc9722d1ece3c0f0773e18dd90965fe5132c20938900
font_01_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 19852 bytes
SHA-256: c524166e7f9cab158d418d3435d4a2ab890d9cb6b75d6afacaf442efe1ec9eb4
font_02_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1