Malicious PDF — malware analysis report

Static analysis result for SHA-256 692929a62b8d1d2c…

MALICIOUS

PDF

87.9 KB Created: 2021-07-28 09:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37caafe5b34efe6353ae5adb8488a45c SHA-1: 5b7d3f9fed82a70b6d1e986893115ea35d8c48a7 SHA-256: 692929a62b8d1d2c3fb2104f595c168c1df042e8e9f0a49a5b0567aa8d6f1950
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of link farms on disposable hosting and compromised CMS uploads indicates an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ff5b109fc95dd05b6fe5a93c97cee1e3/zinekonogusaxevagoxe.pdf In PDF document text
    • http://myhomeinparis.com/userfiles/files/rupowedevowojivawaserino.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/62139086268.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/44337555109.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b363891fef1---62705396592.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae47f87bb5a---ruvekurukej.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6421c858a5b07b6fd7cd6c41cdaa36a1/21431894318.pdfIn PDF document text
    • http://centronegozi.com/public/sowifulijapenegewe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9853c271c---49824968332.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210626_47DD326F62DC0E83.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/rupeg.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36ef1d00ba---volalev.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/xusokagamikok.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/42448051796.pdfIn PDF document text
    • https://vientangluc.com/upload/files/logujedasepo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fccf45c53e6d54b6db8256b57ec22e9b/vavel.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/daad62b6397a89afa6460fd808b75e28/51459039981.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609308a47d9f4---81543223006.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/kumarugasegerirerapobuveb.pdfIn PDF document text
    • https://studiorampinelli.com/file/91048402012.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e1369464d---88258501522.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/savuruk.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/92370858576.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b784b1fe43---40698606933.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f125fac8ea---86591729092.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/rikimiz.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/30051457273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nepali+movie+new+song+downloadPDF 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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 17232 bytes
SHA-256: 6cf4bbab3afe1065cbe0dc34165a7ecb5bf0b060a15909394fc1eaaa3e334091
font_01_sfnt_off000120df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DF 10668 bytes
SHA-256: 243b8ab3f7f8a97d4371f5eddfd5f8e13eeb9648aa0aa8eded87b3a5a3173edb
font_02_sfnt_off0001391e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1391E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1