Malicious PDF — malware analysis report

Static analysis result for SHA-256 9069548f3ac24740…

MALICIOUS

PDF

79.2 KB Created: 2021-10-01 14:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c56b3ef633f6989e2f4387678700cc46 SHA-1: f82fdc020f08c00e4d3e049d47b0174fb049e100 SHA-256: 9069548f3ac24740437ba4beca33ca01903e85e0e6c3f3d9faeb45158cdcd5ef
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised or disposable domains, indicative of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and link farms on potentially compromised CMS uploads supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://coretry.ru/uplcv?utm_term=bangla+ma+chele+choti+story PDF link annotation
    • http://yummyschool.com/_UploadFile/Images/file/nulututonilo.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/51786834042.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/kipojol.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/zenukelezof.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/81832000007.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/mikamofixikuwaxi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210909052702199.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/9e6879e88d7828b6e43d96c48c116749/81455266297.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/tepawuwumelesurimef.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/laximujav.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/zunelezukizakan.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/rexuxivobirokonunu.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/n9gudbbch0vqbeip4hlv088jbt/75523580399.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/visegatopufozutoze.pdfIn PDF document text
    • http://domosplast.hu/files/file/bapoduxavadekadezitewaj.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/milujosigumezaxagologi.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/sakelajawikoj.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/37990917187.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142880b61f14---mimixexasasin.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/49596201065.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/gidejavikamulawuke.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/29608745590.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB445 16412 bytes
SHA-256: ed18f402c66a9c38b909efb5d5e60e707ef488f28436179d62091f6e23b2445e
font_01_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 10844 bytes
SHA-256: 25a3c0a59288b74e21e00af55d20bb22fa34cb35e3ae97ae432ea5eede09c351
font_03_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 19336 bytes
SHA-256: c7122c9dcf55edf6af6c0199dbbb71b0a20bdd05c053c35e3f233dd4f75f8c3b

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