Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba74b6a0423e354…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 12:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 611c598e8e329eb3e1957e2b4e329440 SHA-1: d013425491893cba2e48737380e4515ae46fb8d0 SHA-256: 6ba74b6a0423e35422a9610ecff6544ee79bb9a136ab262fc3bdc73ef6b8bfa8
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

Heuristics 5

  • 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
  • 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://philabc.ru/uplcv?utm_term=satellite+software+for+android PDF link annotation
    • http://xboxheerlen.nl/userfiles/file/judewofunubul.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/40812998192.pdfIn PDF document text
    • http://akademibt.com/resimler/files/44973773367.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091415365173499.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/68289093159.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/19771259096.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130e5fd5e2e2---74263518498.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/11692376063.pdfIn PDF document text
    • http://maidichike.com/upload/files/bageterasipuxefukilazo.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/62442955977.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/57363814161.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/92679616876.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16138a2167c656---xufapov.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/76c0a0ced5af471140823444e3ee3d92/xixuwobusoguxisev.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/12489863877.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210917185021.pdfIn PDF document text
    • https://kimcert.net/E/file/32056407671.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/50509174966.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/bazuretasugarakavin.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/mufububodozos.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/99709150158.pdfIn PDF document text
    • http://contelex.it/userfiles/files/56326758125.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/dutasixubureseremogan.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/93520657214.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/57878395237.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001153d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 10508 bytes
SHA-256: 45ba892a2da4ead5b5c87ef1ce015fb732c1acfdecbe57c047d581585a6f4ee6
font_01_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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