Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e30735bec633db…

MALICIOUS

PDF

77.7 KB Created: 2021-09-12 04:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e94c5654d86cc525eec528971c152df8 SHA-1: d9d00f1c75f2d8b2d1e966729af621d0584bb146 SHA-256: 07e30735bec633db70b9ae2f62e833fb132f07af851f35f7aeffbb81b1e6fb9f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious websites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=como+criar+dois+perfis+no+android PDF link annotation
    • http://atdawnwelift.com/userfiles/file/11100943815.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/86984201449.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/rapub.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/37120369540.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/kopulujipalorijasub.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/11071858261314bf854613.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/64803152181.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/gesenaf.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/70314879754.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/47620248762.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613327296a423---nasozazarosazubuji.pdfIn PDF document text
    • http://metzlerranch.com/userimages/16900523607.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/45409369739.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210909_7F8A2AE4E97F8E4E.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/31139116148.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/boluwab.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/gifoduforogizapakevo.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/25110217198.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/40317769296.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/gidibizikaxunenusizej.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/zulagudadumojurevojodezuv.pdfIn PDF document text
    • https://cristalensi.com/public/File/dogulifatefo.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/zarotilisuxuxifigalo.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/jonepezenemadidi.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/28032334891.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_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 10668 bytes
SHA-256: 64350e1ffcb26424b88f4594ba6cf4b8310467551db2483d326f0c67d511266f
font_01_sfnt_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B6 18864 bytes
SHA-256: a84f55f935bde74c2509f112ff52ceb9069ebe9c01551f2b979795e8dbac697e

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