Malicious PDF — malware analysis report

Static analysis result for SHA-256 96214eab833a4571…

MALICIOUS

PDF

81.9 KB Created: 2021-09-10 04:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 09f12cf1c27588bf457983efa72c40a3 SHA-1: ab020528a7cac4e758510926cd1070e1549a2eb5 SHA-256: 96214eab833a457102df9f4874ffd7ef8a9a63d5c1cb3178a14d92c92296e148
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://investir-petroleo.pt/ckfinder/userfiles/files/39016523266.pdf In PDF document text
    • https://sanipacific.com/attachment/file/96646700716.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/fopezoxigapanokugijim.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/fegolevubulevij.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/36987140635.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46bdc581c11e33026540b8d100844785/bewaj.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/wasuwusukibuvewuzaxawepi.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/8265548463.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/rifexu.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/tusezomuxaxa.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613115a2248dd---14332154235.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/5565616758.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/68907378194.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/77045910558.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/lurip.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/72714792200.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/tebexojalefakedijezij.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/25808311885.pdfIn PDF document text
    • http://beta-rc.com/upload/files/92879150529.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/40462282471.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/9520216191.pdfIn PDF document text
    • https://premiersuli.hu/files/files/vizoguda.pdfIn PDF document text
    • http://canadianrockies.info/files/file/98784059658.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/56541382746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=conversation+notifications+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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 10520 bytes
SHA-256: 3c82005f20e26edd36dc21ac4edd4c10aeb42467795495bd432b344f090d9699
font_01_sfnt_off0000f52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 17180 bytes
SHA-256: 10b64df7eacd4041586f8cf20b8141f6a73322b8a46689b6424367651dccbefd
font_02_sfnt_off000121a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1