Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6e7c64570d60db…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 12:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03dd6742575fc823d372c76059cc70a6 SHA-1: 6bee82edcf3cc9219fdb427857043c21476efc18 SHA-256: 8e6e7c64570d60db4bbe90ff6b332fffd233f45ec79c982c42f08b66a96caa16
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable actions. It contains numerous links to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 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.
  • 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://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/rogalugibofareveje.pdf In PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/fuop1sgp3kfotsi29uq9gtrbtg/20430678448.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210904130913.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/buzorunisikuxerakidij.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/44505603904.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/92102161244.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/mixebe.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/32361334461.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/72716752027.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/wawetije.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210918194737461214218.pdfIn PDF document text
    • http://annabarons.lv/files/files/48458922296.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/28962206062.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613926dfb03d0---sitebotupezawoweriza.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210910205336_80p6w6.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/sezerulukuzarago.pdfIn PDF document text
    • https://anfauglir.com/images/file/97276253094.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/sikime.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/walor.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/gajubegerikaxuzu.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16146fee9d0b26---popedudurezaxe.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/60066905656.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/pemalajeze.pdfIn PDF document text
    • http://knipia.com/userfiles/file/79694593048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=inspiring+words+starting+with+oPDF 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_off0000aec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC7 14328 bytes
SHA-256: d6a3770a213cbd9c969ec5f0e94ba064e10d717e5747a7ce40890f9914945fdb
font_01_sfnt_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 10528 bytes
SHA-256: 34d8b3c1b1ed851f3ef601672142e18ce7d5d249e7989e8e35f31a65c9d68c88