Malicious PDF — malware analysis report

Static analysis result for SHA-256 7315fe7a7a5c8fa1…

MALICIOUS

PDF

117.5 KB Created: 2021-09-02 21:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd800544fd4852751fedde8d0265e091 SHA-1: 64b909632fcd1b0a7fcec89d11329e242c04f0dd SHA-256: 7315fe7a7a5c8fa10a46b51f44d8dd00a40380917c7e45f0a409651b29508a68
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to numerous unknown URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or lure users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://accesoriosalmayor.com/images/userfiles/file/vamifituxawegijewunevasab.pdf In PDF document text
    • https://ctsgroups.asia/images/file/41620980257.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/82841898686.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f576db37800e9ffcb925c050ce458e56/mozatevedavobetovebe.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/sijivavasenasijojili.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/nopif.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/sodipod.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/44848595316.pdfIn PDF document text
    • http://isgsrl.it/images/file/64690010521.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/79hn152afruake3hlqupbsl4bc/25224585843.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d6301b19b---19466296698.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/jqne5v3ob0r73qtd8ia7e98duk/wulixekakiwizufefodut.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7c7830c5413bf494b8295cdbd32f327e/xarasunojosudi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/100077fa3070416cea80902fd0ce8bd5/92777402985.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/7294043203.pdfIn PDF document text
    • http://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/86491882040.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/96730897563.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ee0bbe4bb---9382316145.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09bb91d5fe---83383539871.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/foserofemoperalejuxap.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/92062847113.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fa55dbd1673---galevi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f2460d14---98707675978.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/xaruwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=kia+sorento+2004+manual+pdfPDF 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_off00015d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0D 21480 bytes
SHA-256: df3d23caede1f7296a3666ecb0875a6574c0c8657d00c4710b852b0c57a98046
font_01_sfnt_off00019560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19560 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ad77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD77 11072 bytes
SHA-256: 73ebead1ef9890e2c4b3cc0d5db5850864f53c6405de56792357c3466cb4c2ca

Open this report in the interactive analyzer, or submit your own file for analysis.