Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6d082e77eb6f6b…

MALICIOUS

PDF

86.6 KB Created: 2021-09-15 06:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f2936f7bd27e8d81c8c486fd45a4141 SHA-1: 84cf90968468be6210ac66f60c4e5d4eb8da8c00 SHA-256: 0a6d082e77eb6f6b67c74c03194121536ac78ab1f455e655efeba6024208d7ec
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to other PDF files hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/71858723021.pdf In PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jadamewawigakesag.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/zuxororebasurukonezaxoli.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c50e204c9---86048550354.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613966744a4c4---19946268627.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/fugoruzudivepo.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/79759987820.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/68043058629.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/73441769491.pdfIn PDF document text
    • http://sgpeo.pl/users/file/22100969802.pdfIn PDF document text
    • http://yuli-china.ru/d/files/virijinimar.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161392571bc9c7---fewuvaxazuributufum.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406a603f9f1---taromufiviramusazifo.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/wekutimurazonan.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/73957278700.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210905203104_vez86p.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/sobole.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/jevamigobodafupigese.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/25159636289.pdfIn PDF document text
    • http://bulmarconsult.com/files/25041060966.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/zipodefepifewagarasir.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132c9059275e---mowomukezolufurix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mario+64+last+impactPDF 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_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 10536 bytes
SHA-256: e8ad57486aa9020a8ec98c91b782961c0aff39a36125705f832a66f559779ff3
font_01_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 17744 bytes
SHA-256: 15ccc7c0e178a1e648d9de42d6e651bee0fb4543db50ac1512c96488914bd317
font_02_sfnt_off000134f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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