Malicious PDF — malware analysis report

Static analysis result for SHA-256 a076e191fcea9a83…

MALICIOUS

PDF

83.5 KB Created: 2021-09-09 13:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: bb2eeeb3107cce16fb3ece80a61a5340 SHA-1: 8476d3dbb2c1b1dc07f45230ddd23c83e764de31 SHA-256: a076e191fcea9a83cdf8c8e9d9c972f6b74d129a8d4a750551fde7a03e835199
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://beastyenergy.com/userfiles/file/71100275318.pdf In PDF document text
    • http://beta-rc.com/upload/files/mofonazogerekokeduvivim.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/nexobeguvujabubajusaram.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613492d966c5e---bikifefivatibonutamuro.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/39805481445.pdfIn PDF document text
    • https://basisangka.com/contents/files/71003291952.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1cb9256e1---jufikupizulujusas.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/12413531470.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/kapidovasaser.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16133f56580f53---42740614854.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/legokejarobabiti.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/nimej.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/fotukot.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/zepelolex.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/59168077269.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/71619982243.pdfIn PDF document text
    • http://sayarbobinaj.com/file/nugotuxirorixojuril.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/36891262908.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/geridev.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/nexaxirolusalexuvisaro.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210906160010656.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/magusosumizejexov.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b6321ccdd962d680d6c61021ef92d5fc/pabaru.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/zofawejasatatuv.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/29822553829.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/55058449209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pati+patni+aur+woh+full+movie+hd+download+filmywapPDF 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_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 17824 bytes
SHA-256: c88756e61cb0590bacf3729e45432eff75d1231bccc5090f41b245d5e1bf8a02
font_01_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 10964 bytes
SHA-256: 00b48a8a8476e31bdca301b595dcccab16c1fba47bec047d32e337beafec9ac9
font_02_sfnt_off00012768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1