Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06627727dc77fdd…

MALICIOUS

PDF

87.2 KB Created: 2021-09-09 12:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a54431fe8e798aecfd699a0324bccfd SHA-1: 524c7320dbd8beeeb441422f96654b7276fd199d SHA-256: c06627727dc77fddafe4913e801026ec2fba21de4043e8da1ffb17ac342c4df8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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://gursakaryahukuk.com/images/file/fijozogima.pdf In PDF document text
    • http://productinfo.in/konadnew/userfiles/file/70896759359.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/gujawubotakezej.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/xurevaketisin.pdfIn PDF document text
    • http://iltorg.ru/upload/file/desam.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/71282321987.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/21574677553.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ffc09035789afa9e09c44ea31c45b36e/povifewedogebigamijabaka.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/18713588311.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/30152181859.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/pazamex.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090200523746.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/22469854687.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613120865c1a8---damin.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/dokuzolazis.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/54706770863.pdfIn PDF document text
    • http://www.og2c.com/images/file/93837913689.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/fakunuwituluda.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/74405247564.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/92418690483.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/70282977617.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/kajidobetesibarexitid.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/95261613531.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/85825194786.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/sojufukofuzabupesavunuwu.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16132b72170664---77522283961.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/jobuxabamulile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=my+hero+academia+season+5+episode+10+watchPDF 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_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 11232 bytes
SHA-256: 0995adb929b3fae7d4712c5760ff446b6c7b5058d85c8f48237a2b4c41d6f575
font_01_sfnt_off00010997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 17392 bytes
SHA-256: 723205378b4cfb2ec77e4eb0f294847fd080b3aca2b9a52cd39c2c8409a5b889
font_02_sfnt_off000136ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.