Malicious PDF — malware analysis report

Static analysis result for SHA-256 9046247d8ff06ba7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 21:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 567067059c6107b89e93811493978b93 SHA-1: 72f32130fa32a61179e72dbdc4492b10086554d0 SHA-256: 9046247d8ff06ba744568445fd14b5b2271f74f9179783b2036177338c1220f2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and the overall structure indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://medvor.ru/uplcv?utm_term=dragon+ball+legends+crystal+hack+apk PDF link annotation
    • http://pizzeriagiganti.ro/imagini_ws/rujokizikonutikudaba.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/kebiviwenovej.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-15/20210915224323892175.pdfIn PDF document text
    • http://www.keizerco.nl/userFiles/file/59783755818.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/2595061446.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/68850801169.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/jakorifewisafotaki.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/dexodovava.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/ranoroguxubite.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/35891285971.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/vadizamitogabowij.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/mifuwejitizejo.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/juniwuvuju.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/11422771071.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/dakujivovosodipun.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/velajovidatapovoduj.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/kolugitetapekixixo.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/43599942546.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/1672330216.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/dodopimonalojututibu.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/xexijiva.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/zezerirejujovasipelewur.pdfIn PDF document text
    • 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_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 17228 bytes
SHA-256: ff5085cdaf190b97ca7d8250027d51c623c55934690ffd7979f9aaeb56f093ce
font_02_sfnt_off00011d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2F 11048 bytes
SHA-256: 7120560b25fbcc20aabb351b3e374e548c28391357a66eda4a7692be59fa2c21

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