Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ed06629aad4c8d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 00:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ca5df1843ae10230da57879aef211cd SHA-1: c1b1462e709eeb92f1d64fe3a29e343023e135ee SHA-256: 27ed06629aad4c8dc22d4a425f695ede0090c9577e4aa4d3ee1e2398eeb6af01
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URIs, many of which point to disposable hosting or IP addresses, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=offline+marvel+games+for+android+download PDF link annotation
    • https://la-klamm.org/userfiles/file/86562192960.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/4494500686.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/sadugemebigitagonoz.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/vulivegutetitu.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/cbc0a180a71cec033f5f9c150c4f6d2f/karonanezaxejezux.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/wemonoda.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a86263648---nukebobumagiw.pdfPDF link annotation
    • https://cengilli.com/icerik_images/file/vapipanipetegapeve.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/19548234250.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/zuliviwebazitazanejaza.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/xenomep.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/81541954051.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/zozejuzekeg.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/98881851046.pdfIn PDF document text
    • https://renewone.de/files/golusixanakebiruzedu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161311ff212761---12987302021.pdfIn PDF document text
    • https://robertbah.si/files/file/77657907245.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/tuwoxenikimazigo.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/denopikenadowozeji.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/kejejaxak.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/96203726984.pdfIn PDF document text
    • http://youil.org/userData/board/file/33342583960.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/zugopelera.pdfIn PDF document text
    • https://andrejc.si/files/file/19967722745.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_off0000b24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24D 16332 bytes
SHA-256: 12f667cbda70d210314376de009f8897b20c3598ec9a4679d981e5fd1f527224
font_01_sfnt_off0000db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB41 10776 bytes
SHA-256: eb32a378395996a42c78b5cb64a318f446f1360e863699a0fe111dbb501ecd71
font_02_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1