Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49ba3e273266045…

MALICIOUS

PDF

71.3 KB Created: 2021-09-11 00:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 59fa28f3dae56421d8c27f54ecbb0d0a SHA-1: 96f4e4f08499750eca650a7c81aeff578a39b895 SHA-256: d49ba3e27326604524f9c4f916303f55443bf9a873bddecd2f9c482a606ee65c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm with numerous external URIs, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.channeloflove.com/ckfinder/userfiles/files/furoka.pdf In PDF document text
    • http://louisamerino.com/userfiles/file/14693139687.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/godagofazu.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/figiz.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/77649678470.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/lawapus.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/nojelajebu.pdfIn PDF document text
    • http://enewind.com/pliki/file/93511038144.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/11366388861.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/rirexegowuxigixu.pdfIn PDF document text
    • https://shevian.com/images/file/76255045075.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/lonigubonelikokelixawon.pdfIn PDF document text
    • http://swhos.com/upload/files/62015500402.pdfIn PDF document text
    • http://hak-al.com/resimler/files/5710206037.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/92617815548.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff47e28b01---sapomawodekepijawijeve.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/jupudabafus.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/kigabutefabaluv.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/fezakoxizimexefewogosen.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/mokibupavolakiwaz.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7cdc8c847dddbc10053c7a6441546243/zupetoraruzesozetinod.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/pasuvi.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/64608156408.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021971244156006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=all+words+that+start+with+sPDF 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_off0000b7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 10176 bytes
SHA-256: 8e6656797bb1a8e4ed1fc725cb3bc2fdc66c02b608462c3879aaf082e764b3b0
font_02_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 16100 bytes
SHA-256: 638af6b47ddde529d636e1b9026f87467acaf9e996c7760ae18d9e40824c5aa8