Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e5f13dcc4255e6…

MALICIOUS

PDF

73.4 KB Created: 2021-09-01 00:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ac549127fb4c16228ddab688228cb37e SHA-1: 8849d68c02ec79bdb7d6f64222b5473acd227793 SHA-256: e5e5f13dcc4255e62f0f8174359781c2f6f2b25c98aa177ffdaf98cfee0bc429
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, with several pointing to compromised WordPress upload storage, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted from this sample, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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 http://sungwoneng.com/upfile_editor/2021/files/95466053248.pdf In PDF document text
    • https://promise-land.com/upload/file/dagumugokemixasadivij.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/gosixodobuzulidokemava.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/80934472155.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/63971271797.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b89efa7e478---giwelisuludi.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/76140330575.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/nikabinovuzafolojizifiz.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/35132269114.pdfIn PDF document text
    • http://mamam.by/upload/File/file/nigefodim.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3dc838cc74---20756624627.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/cvn1h45cpbm98v58gs4t45m4e0/gaponerunidegusaxizife.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081156feda5a---belidevobomolaw.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0f4c13d2648e1f34b3a6962076b7f3ac/65687376576.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/84513899744.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/liwazupiwifo.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7d673429d---31864453959.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72e62650e---pavuke.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93245af9e056c25f2c59edca506811bf/64095086832.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/14380171849.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d52ee495b---73694482853.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a79bd0e55---88315429989.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/9391159b5a65eeef89bb6cd81e90819a/gajuxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=salvage+rv+for+sale+near+mePDF link annotation
    • 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 10508 bytes
SHA-256: 2bfcaad9816eb55ddd0ae180907b36536d564347dda81f3930a64ec771b8115f
font_01_sfnt_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 18160 bytes
SHA-256: 6f1dd9bb8f93555d5ad70ea6befe24d411d260ce34b278740dbd03ab9d114b57

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