Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaae16b067ae6db0…

MALICIOUS

PDF

91.6 KB Created: 2021-09-12 09:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4368c4d9a579fe5e1839b345e34c6286 SHA-1: 5eb14f8e27451156681e13cc1e651092018c4695 SHA-256: eaae16b067ae6db07a7df94ca62ff43fadad513b6188b69e8810bda1ba9f6e8f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, including one pointing to a raw IP address, and several that appear to be hosted on compromised WordPress sites or disposable domains. These links suggest the PDF is part of a phishing campaign or a distribution vector for further malware. No scripts were extracted, but the presence of multiple suspicious URLs indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://burragebrothers.com/demo/jolie/beta/userfiles/files/62477901766.pdf In PDF document text
    • http://185.33.116.145/~acus01/upload/files/18217379541.pdfPDF link annotation
    • http://sjhrz.com/images/upload/File/3508338185.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcc548277890b7edc018ea68a0f873e5/15406823176.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/46231592935.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a2cab5d9b86b7b291a75b3c90e54dd96/49622524118.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/mizumesulofivonupuven.pdfIn PDF document text
    • https://e-room.co/userfiles/file/bozedudisiguwol.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/rozamoxoxogesaxanuxowi.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613422a75bf24---rakemakolujologa.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/zasegapetokope.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7b2ebbb6---45213148151.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/45940835217.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/47834596935.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/29404450984.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/95326918873.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/juwolinopogaraveludaj.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/gareteje.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/2864085701.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/ramozatakibabefi.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/46887451042.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/79727619714.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/22255416460.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210903232000.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/36914461494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+long+is+do+androids+dream+of+electric+sheepPDF 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_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 11144 bytes
SHA-256: 3bf5c4a99e7b2f1bfa82adfaa62d75a44add65653df747ea25c0eba2a245142b
font_01_sfnt_off000117a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 18844 bytes
SHA-256: 819a75119d81bf14eb755b09e91f8f845168c34e2a034ea0fa586d3285fcb737

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