Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86ae94ae2f7c8ef…

MALICIOUS

PDF

72.6 KB Created: 2021-09-25 06:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7a61bfd87c8c36308d2e92742a6da03 SHA-1: 34c160eb251171c0fb896068f122b063fce38ae6 SHA-256: c86ae94ae2f7c8efe7ba3d6fa9a597d2519e66e1972d6adb07f366980dad4714
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to a compromised WordPress site, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • 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.
  • 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://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614374e03e522---63970094875.pdf In PDF document text
    • https://12shio3.com/contents/files/2324434230.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/59387220658.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c848d1bf3fcb0fe73bca0846b356a113/linepubikem.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dcc76b80ab---91190749968.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/voramo.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/fojumelulo.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/ligetaredenixem.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091923204173499.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/lizusuvo.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/jarukuwap.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c86e4900c6ae2ce4302ea7e76cda1551/14662724291.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/98678542918.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/lomesefividawesuluf.pdfIn PDF document text
    • http://ccsl.asia/files/gogikigiseremexeweraw.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/getid.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/xizeje.pdfIn PDF document text
    • http://art-ball.net/files/file/87307567418.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/10334810183.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/97927423082.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/18540187220.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/qkjnhsd5i8pqg1c3a78ugkjn2c/29617105680.pdfIn PDF document text
    • https://eternalbliss.net/file/tejuzudevepuzezuzepexi.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/jirifaxanilexijo.pdfIn PDF document text
    • https://grouptm2.com/contents/files/mimapapopew.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/59207584489.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16134d8e452981---nagenolegukupawobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=come+bloccare+la+pubblicit%C3%A0+su+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_off0000b629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB629 11128 bytes
SHA-256: 2c96a49bffac1ded7b618bdbc0ab014da9db56aadbfe3cdd56b17f3c136a4878
font_01_sfnt_off0000cf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 16808 bytes
SHA-256: eebab9b237997e54e6648076133f9ef54c030b6dec75dd3f48628007caa62de7
font_02_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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