Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bbd2d52181205e…

MALICIOUS

PDF

80.9 KB Created: 2021-09-12 20:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0fa1b6b08028fe5d65a89323c4e2e89b SHA-1: 6945eef7c12d694246ad9b5d304ea9b7b77b5c08 SHA-256: 27bbd2d52181205e2038b91acf3fa55e35079b8a5dc9813b6dca902b43d8d06d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the numerous unknown URLs suggest that the JavaScript likely redirects the user to a link farm, potentially for phishing or malware distribution. ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://erictex.com/ufiles/files/burevep.pdf In PDF document text
    • http://speaklifeiamgreatness.com/files/files/94695835358.pdfIn PDF document text
    • http://yibetter.com/data/files/73040211317.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/befozejitavute.pdfIn PDF document text
    • https://5uempat.com/contents/files/49024110426.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/tifenixuzijuza.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/33564119389.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/pujuz.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/30134399859.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3ed212ad1a952e37d5ff952cf80c75fd/bizuxolodefazugiwe.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/sivuzexuxemujerefabak.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/faduzuxomurimavowunul.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/wotujus.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/pavuvokusikusebus.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/89815797802.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/rituzafu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/3k2v0jloha7q9ahl7lq58qg037/7563280957.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021090404482818.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/75513365428.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/kipebabesixonema.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/21889937849.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/43281097006.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/98086874023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=comodo+dragon+for+androidPDF 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_off0000d93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93D 17532 bytes
SHA-256: 8c9f9a05a2a66af9ff738156793826bed0de1f7ff61245190ca78d3767b30e5b
font_01_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F38 10284 bytes
SHA-256: 9abec68084d9b10f7b840a652e2fda613d4c164422cb29b135d3f30fe71cb460

Open this report in the interactive analyzer, or submit your own file for analysis.