Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d84fca90ec6f0d…

MALICIOUS

PDF

67.6 KB Created: 2021-09-26 17:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 27f6bb909d1669d218fe7a01308fc4e9 SHA-1: 5226290b8ca811b706d07ebeb223010ccc66a84b SHA-256: 95d84fca90ec6f0d84f9b5d7836bb40b1f21829c5035796b7ad24486ac026ec4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure due to its image-only nature and clickable action. The document likely aims to redirect users to malicious URLs for credential harvesting or further payload delivery. The presence of multiple external URIs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=export+all+contacts+from+android PDF link annotation
    • https://sanagustin.cl/files/serigag.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/pupepeguritufonira.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/gitumunanarefakerasebiwe.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/83751650959.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/68527917097.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/bikozidamod.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/vebadamugudefamuvi.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/86794725592.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/72607420528.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/menugisap.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/51698704331.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/62106725226.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/91390339140.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/nepupunosumomofudalowoko.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/feresuterepufusopomebim.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/22461565170.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/zigixawusisilo.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/8265526431.pdfIn PDF document text
    • https://visualarchive.bg/files/jogutuderabafi.pdfIn PDF document text
    • https://beautydent.hu/editor_up/nowemavumifufawurewizerav.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/54081024640.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/52094529064.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_off0000adad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAD 10732 bytes
SHA-256: 94c158028013de4d8ffb86ece147819f31f8f3bfff55e1f2db34341f6dd8b3c4
font_01_sfnt_off0000c648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC648 14064 bytes
SHA-256: a31b67d5dbb8a81c30004beb9a0c030fbacd59d506d45d52942f08761223c1b9
font_02_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1