Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbed9f5fd1d4d960…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 11:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da87c04963be99fde164bec500e0723f SHA-1: c546c00ec0de28f161e00d05f7021917cb65be02 SHA-256: bbed9f5fd1d4d960adc03fc77f56d0af5bfcf80cabb969daa0f4d18bbbeb92ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm intended to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://gamedunyasi.com/calisma2/files/uploads/rekirigikirasuvumezorola.pdf In PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/82672889864.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/mejavatew.pdfIn PDF document text
    • http://hmed.vn/upload/files/sipadinigadow.pdfIn PDF document text
    • http://xn--lenachatka-57b.pl/uploaded/file/zigubosub.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/68124931569.pdfIn PDF document text
    • http://acril.ru/ufiles/files/8213196857.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/29923660684.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/91658081853.pdfIn PDF document text
    • http://naso10.com/userData/board/file/ruxuxigugugedepefipidezix.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/40000248678.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/vinez.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/ribisu.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/kodaritexasu.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/tujufomi.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/pezefexokuruli.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11687551183.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/45137930115.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7292a525eba3499e4856f83168a5f7f9/zujogakopunodukonet.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/bokivalobulamuzamago.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/kizumevusuzam.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/13628767468.pdfIn PDF document text
    • http://ifap.it/images/file/zavabegogewibesesubeteda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=app+inventor+ai+starterPDF 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_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 17584 bytes
SHA-256: d2ceff272944f96c6daa30fa4d31aeb5991fbce24e328e90f3b1ce38957bc081
font_01_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 10244 bytes
SHA-256: 09eaca4fdd0a5485feed3469e9560d8892714ac0eacb7bf1947a0f3ca77007fb
font_02_sfnt_off00012acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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