Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e48f1f40bdee3c…

MALICIOUS

PDF

76.4 KB Created: 2021-06-15 11:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df0287766e132bf60271b63d106c6909 SHA-1: 5fc69cfd8add4505ddab4f091e1d570ad08a3532 SHA-256: 89e48f1f40bdee3cb49032d8ca8053399e0fc6b4d4ca52f990aa11c8849584f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://allytemp.ru/uplcv?utm_term=primal+ancient+diablo
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hm32t1gd0br2eealnv370dj64f/8170031351.pdf
    • http://narnivet.com/userfiles/files/nuwoginorenobijuj.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47746f1142---dikoxub.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/5ukahck49kk36v4mu8u9gnj345/60420678011.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/f69be7e757f9502326a61932dfe0aab8/zilaniramurekazorib.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082926573ec2---98132737030.pdf
    • https://yildizwebpaket.com/calisma2/files/uploads/vudafawuzoremosejobaga.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a251da64b86---66005576567.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ap8u3q0no9ugnfublc1qg9b070/sebepajoxalakijetugopil.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/2502e35ff9ec1f7d895e61d0e1e8b7b3/risodiluxob.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905e880b238---gebatixazilurejufu.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ejote16vlv9vo7itnb5frgqbj3/47963926593.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/alrci59hnoq01ak7p05mr8jb6p/vizodis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d130e42e1cc11c92d6d868ad92af7f09/judowisetivuduxaxuxekumus.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f2a8f20c302a06abbf48d053f1d4b8d2/5781635596.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3e.bin
e03d36a394db7a6e1385457918cf7ce259abbb85e5cdc20f1bbfc521be069cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5048 bytes
font_01_sfnt_off0000ff48.bin
0588557f64f48856b1c3c89fafd8c42db1f7386f1abfab37ef3c56f4e0739c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 11020 bytes

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