Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ee6474266cdfaf…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 15:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 71c044a0f8c220ce0ec210d912028fc8 SHA-1: 8370e1b1bab6b5a10e47e0a22c681b1ee7b979a0 SHA-256: 24ee6474266cdfafd040fcd8140cd013477ce51c38653cb7af24c03c677b9fd5
212 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links to external files hosted on compromised websites, suggesting it's designed to trick users into downloading a payload. The presence of a 'download button' lure and password instructions for an archive further supports a phishing or social engineering attack pattern. ClamAV detection and ML classification confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f14a0653a4e5a30f052f2252fb77dc67/49731951656.pdf In PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136e8cae39b3---xawakexobesesuvirotukiniw.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210902091121_c2lnYWZ1bG9rb2t1.pdfIn PDF document text
    • https://hoongnau.com/upload/files/30992072903.pdfIn PDF document text
    • https://lesura.net/userfiles/file/nubakarov.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/lusebulupofusumimaze.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/ferimatibupexo.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/sajikesejekobomikoj.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/51536426636.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132f5aac398b---56204705273.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161365445e02c3---tutirasazosadiluve.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/71567737047.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/26815877854.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/tedaborujuki.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/wetotifapekev.pdfIn PDF document text
    • https://techlan.pl/files/file/2064759678.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/zunexubumumewajapuzadumet.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/peledeb.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210909110410.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/57413747057.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/14696222543.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/kukawabagerasagamifu.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/41427449717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+download+chrome+on+android+tvPDF 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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 18208 bytes
SHA-256: 707d1e1162ca8210021a54e88b1834ea14453133047f48cf0bf4efd1e3dce8b3
font_01_sfnt_off000109a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A1 10608 bytes
SHA-256: 2355fe64e1f82a6384e0b414b1340b13272624ef57220144d04d6879bc6a9022
font_02_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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