Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e1af5ee176fb1e…

MALICIOUS

PDF

84.4 KB Created: 2021-09-06 14:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 72e3a8e501ae2d010ed927da446378aa SHA-1: b59c00c12e5667e802cbb7e73870d8afe3efc4c2 SHA-256: 20e1af5ee176fb1e46ac2dce5bbf127c4a75e2f5163081a257a3f3147699356f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on compromised CMS upload storage, suggesting it's designed to redirect users to other malicious sites. The presence of multiple PDF-related URLs, some pointing to WordPress plugin upload directories, reinforces the attack pattern of hosting malicious content or phishing lures on compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f4ead9bc9---33048825239.pdf In PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/novusupigozijoziwupom.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/0966da84f6eb121f38be1cd0a1b3738f/29141293077.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/70138865119.pdfIn PDF document text
    • http://medrea.ru/upload/files/86797162868.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/24baab5b869ca01611e40ed398497689/53950827812.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/70179061332.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5967a8a3---79193227372.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/83798069270.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/54246713490.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/xubukazexiruruxel.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/mokekejerugigekukad.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/somaligibojezuxolerepi.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/4230064151.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/210620030421993149d4o72.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/237d9c66b6df1f7b1c6d89e0ccd4fde4/22092338844.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4451e7b4dec1ff338bcff7ed579edf06/84308173912.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613565c67fd75---lasowafusotolim.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/8835100474.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a7560b1e---31769110034.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/zesavotudi.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/eba2f8b7c45bf791098a494e148ddbdb/kalavewetepokidugotegeno.pdfIn PDF document text
    • http://4bx.pl/public/file/21467479620.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/17696575106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=corrig%C3%A9+livre+physique+chimie+1ere+s+hachette+pdfPDF 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_off0000dcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 19592 bytes
SHA-256: 03508c01e52b280648f5494ecf8d5323ea7c7a8d67d573f6df0359cde34bd28a
font_01_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12606 11628 bytes
SHA-256: 49331d18d7b5014de219bb879c8b5a5a7aca381870897c31f4ad6b9f094d6919

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