Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04e55d271a3b8ac…

MALICIOUS

PDF

74.4 KB Created: 2021-09-18 17:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eec0aa05d7c4d14cd9778cbc4ef0d1db SHA-1: 53acfb1e4a256acd32ec1588c82b6dcc17cce9ff SHA-256: c04e55d271a3b8ac9972c61ced641224d2c2310b2f42cde7563e663666385b63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://retailcop.ca/files/tiludijusogogojuwarixafe.pdf In PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/sodubeda.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/fitobelubukamulil.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/55520288880.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/57336926890.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143316806e4f---jakubepuvumero.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091114063773499.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/98581530713.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/47833262031.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1b28ac0a4e5a9e528e1a6a4a85fed463/retexevevozini.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/90034218629.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09d928d43---dararixofozoragetaxek.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/42020732226.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/22751126644.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/nefoximejojulobofidi.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109040759231835.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136a108f3439---nelumager.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4604t9mj2m993c084dime9fouc/19825458917.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/nirijinurapapijo.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/fetufapugoxedew.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/56241115138.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d41388f511a6e48bce0f64668ac69716/bopoj.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/43840886288.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fca20076a8---46328198100.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/45183271503.pdfIn PDF document text
    • http://centronegozi.com/public/zugoxubifamafatevavufa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=magic+of+scheherazadePDF 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_off0000c19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 10560 bytes
SHA-256: 3f2f79f92576942011af9693070c5851fa35ff827400de8c4f674d04fe3cb1e4
font_02_sfnt_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 16712 bytes
SHA-256: 839e1d3662d0032487751773e49786f8ffdfa8700f712e6c44adc8af669d52f6