Malicious PDF — malware analysis report

Static analysis result for SHA-256 678e1c30ff36787d…

MALICIOUS

PDF

83.7 KB Created: 2021-08-12 08:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5419d99e594acb6d5b7f7003f397d1aa SHA-1: 4d557004bd0cb1b4ed88f31030ed17d385d49108 SHA-256: 678e1c30ff36787ded38aa93446cd2a8b33acdcf9827ff31b7dd30f8a857089a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97ed7192c5---25420555000.pdf In PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/rikezode.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/3176201180.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/122da98c8ee45243ee2c9611d0f4f335/98839149076.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/59428335016.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607df724b0951---91424274938.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/takijibufinagimivoro.pdfIn PDF document text
    • https://menu2uplus.com/images/file/9772281160.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/zuwexezaneziwulazerasa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7cb86688b560ffa1dc3acb384930ab9a/90207648685.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/71352757312.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/10b29a72669f9346f5e910f1c342215f/jolisukijanigegemexi.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/fofamujovuxujukodiri.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/47892343629.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/88445246309.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/92475321919.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/67271651721.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/e83bdbb28bf37baa8a022fe1c6f7b187/golozogod.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/bopowudetobekogi.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610cb3ca00f12---bifugofexedepavixovig.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/nabatiletavowokamakumi.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/74804696608.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/89991804095.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/rutipepudegaxaxisago.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7e042c68b858864f35f5f1809e494ed1/32933466250.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/jimijajoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=paint+tool+sai+1.2+5+full+downloadPDF 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_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10676 bytes
SHA-256: 9c8a24c0f64845826cb2c96d36761cb0c762961d2dba1466de2f27c1bf360983
font_02_sfnt_off000111c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 17620 bytes
SHA-256: 20471dbd9cd19fc799f8968afdd07036929f13929baa18529deb9ebcd15c4101

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