Malicious PDF — malware analysis report

Static analysis result for SHA-256 1574f079892805e9…

MALICIOUS

PDF

69.3 KB Created: 2021-09-19 04:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 603dc193f69a0b8f21721a1e343a1584 SHA-1: f76e1dbe7334b323ba81c9c81351dadac9aba925 SHA-256: 1574f079892805e985e364f8863967fd9d955e75329a0bdc8d28f02d2cf4e5f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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://smidgel.ru/uplcv?utm_term=wwe+ppsspp+iso+download PDF link annotation
    • http://szm.hu/userfiles/file/gadonafizonit.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/9073011001.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/merobedunoxupe.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/61209720314.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/9mgnn1ees34583iq693u8vemv2/46137223731.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/78835146012.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161417dca88d95---9264177427.pdfIn PDF document text
    • https://krossi.ru/images/content/files/77395312836.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/matatagimasag.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/87018566738.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/tamidatod.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/77374579445.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/wijedupesak.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/18217746146.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/15736667287.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/26596747180.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a84c45230---90452889909.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/91384882357.pdfIn PDF document text
    • https://lordoptika.hu/files/files/77546359615.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/c0bca28046596b4d59c0155991a1f6e4/95094550696.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a01b1f1fef---tuzovope.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/vozen.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021091109514373499.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_off0000c459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC459 10264 bytes
SHA-256: a3ff3318cdeb0f525051cd99047eca3008172918cf1431e8106204ba309733f2
font_01_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 17128 bytes
SHA-256: d490401ae363b539f8de25b0f846707b9903880b2b51e7a0da186b3368a13789

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