Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d9eda01e0133cf…

MALICIOUS

PDF

81.9 KB Created: 2021-09-04 17:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6060a9adb3edaaa1b2910be349cc6c75 SHA-1: 8eaebef73ce76a35d53eba6cc2c27799c69115f7 SHA-256: f3d9eda01e0133cfc6c62cb9026fb27eb13951a3e5e923caaea70141f6ed7dca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress sites and other disposable hosting. The primary attack pattern involves luring users to click these links, which likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=environment+and+biodiversity+shankar+ias+book+pdf PDF link annotation
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2d6c20abc---zevipe.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///zorufetowedufuzukudateke.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/vavajefigiji.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160721e99c1fb6---53089661512.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/tavuluxomekofibigaxajet.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/zakotinefapuxe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4b931232a---vazirimupejesojonavujek.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/bibarax.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/nerekumilikejew.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/71485517672.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161134c51117d0---tajubugepusuw.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/jiwozawevozabebebagirumim.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/38056543836.pdfIn PDF document text
    • http://uci.ir/userfiles/file/besagalibunuzavivajumi.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/161277a09d0fa0---11473369104.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f89e85d9a---9950501150.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160de1ec96e196---92165452548.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ce38c4e668---nukikixe.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84e8b7923f---lowepaxijapipuweli.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021522053552462.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/61689422730.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607401ce791e7---xedutujeva.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_off0000d63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63A 18812 bytes
SHA-256: 78a4aeeaad9c2c1b996bd6e1fc0bc8c155c943306064f1cdb934a8f20a05a750
font_01_sfnt_off000107c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 11112 bytes
SHA-256: 8ae0bc33861b52efdabad0fe9be69854b8e0536e68ef1e568cd71e07ced2a030

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