Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fdbe1e12f372dac…

MALICIOUS

PDF

80.7 KB Created: 2021-09-15 13:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ae0870f1814bda599fdfcbe8bf7f9ba SHA-1: 2afd9a63ed70bcd2507bf9ebc13f8e7edd13be60 SHA-256: 9fdbe1e12f372daca039d952069add4161391dc4f4571128603d75745d94ec3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, with one pointing to a raw IP address, indicating a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly support this assessment, suggesting the file is a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 http://millionsdiscount.com/mo_images/files/jotekim.pdf In PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/83534872107.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/sajusamoxoxipoxu.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/kilatifuli.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/21936828985.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/93621391192.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/vamug.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/13828901520.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/xafomukebemikepa.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/91340954687.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/tonagonufevumaduj.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/majegerononazerevub.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-6/20210906123146752964.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/vetinekevubavipax.pdfPDF link annotation
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/88042119786.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/fenogimigovuvefarax.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec96fc2865---72817618653.pdfIn PDF document text
    • https://harmony.im/userfiles/file/20880902748.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/20268701284.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/situxagujiwidonuve.pdfIn PDF document text
    • http://charivne.info/images/file/lubokamuvibobo.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/30670683336.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/zepumiwerikebusituzudaxa.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/tuxujineroxanotifen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pokemon+rumble+rush+game+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_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 10924 bytes
SHA-256: a2f68c85418fcb9edda5217bf0431566e2bdf4a412d83ea441366d15c0d00ca7
font_01_sfnt_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 17832 bytes
SHA-256: 15be67e98b7ed098898e71832a21c5a9aefe3de4c14a9a13329029e86aecca0e