Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be829ea6902b022…

MALICIOUS

PDF

121.3 KB Created: 2021-07-02 12:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b34d4df53d9a6e5531c47a7055a3cdb2 SHA-1: 7d7adc184388d876afd651d68891643b52d75e96 SHA-256: 5be829ea6902b0224a698f76c6054a76f2a3ed43132f57fae2137d3b85c4a462
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be SEO manipulation or hosting further malicious content, rather than direct user interaction within the document itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://decamiones.com/userfiles/file/guzopuzizupo.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4d93057189eb9ae0f94d6b8a1702576f/xovorazirobatajupama.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/db85fd6b29a7e11ecc2e56dc13063a8b/53719451968.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b7dc2a0e39e3e62945dd750a4c97fc46/sopavegerazesuxujejub.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607176b8c45db---mizexonuwibusesisobasagit.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6f1b910ece0b69dba275e0ac9a4a098c/46902554682.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0efd267581de09abcf66ada03fe514e4/5624209488.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/97966104034.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/61852859142.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/59414660239.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/24236006397.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/pawumajovixitob.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8941b785c---kafavavamijudubidemulewo.pdfIn PDF document text
    • http://pk.mo/userfiles/file/52239431669.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/fd909b6491910e9bd50551126af979a4/47862863340.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/27fb4211d988286de775d283f895c4b0/76401946596.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/sivufiwoxekaja.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/41775136244.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/gedajosexizufodedu.pdfIn PDF document text
    • http://firegallery.ru/img/upload/sesurowenevipu.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1261c6590---49252567018.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/12895321034.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a855c4a1ae9---wikuruvokidisikepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=black+spider+with+short+legsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3a2519e5---76756171439.pdfIn PDF document text
    • 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_off00017892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17892 10920 bytes
SHA-256: ae40280ecc81f7174ba3c08b83c145adada33c5a223de3a1c799f36bcd06768d
font_01_sfnt_off000191e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191E3 17064 bytes
SHA-256: 70b3579f5f177b142f561b7d9b449851deccb706cef5c7d1be30a174c88e45b0
font_02_sfnt_off0001be6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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