Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c13242b275f835e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-20 00:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 75b57bf302b7fcf0747ea1f79f123ab9 SHA-1: cb704ef3bde96ff56d3156b032585bf64b6a23dc SHA-256: 9c13242b275f835eff7bb1949bc75a02c200697618c2b87f7ca378186089c21b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to act as a gateway to other malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=barista+life+apk PDF link annotation
    • http://keyflounge.nl/userfiles/file/19733986874.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/metizegedulovuxovalokedez.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/62440376656.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/03d74e78e9613e62a051112f7b6cf664.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161468c17ac84f---70451520089.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/nenimuj.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/ganodamezevepenuve.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/lelirotaxaguzozode.pdfIn PDF document text
    • http://torgoborud.org/images/file/rolukumapufuwofemimofotiv.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/50902682247.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/29177084907.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/zosevivow.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/nasolutufukilekaxevi.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/muwiputipiz.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/78415371864.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/botanipobu.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/zekelawukukob.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/lusap.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/67862786369.pdfIn PDF document text
    • http://polipack.ru/content/file/78348308797.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/benimidedoj.pdfIn PDF document text
    • https://kiptep.ru/file/97267911569.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/46365158789.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/59873972473.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/jiroxigefogoradamad.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_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 19004 bytes
SHA-256: bb6f3c42ac13e00da76b6a3c6f16c8c53ac4520e6395a95dec8284f571ea3b01
font_02_sfnt_off0001329f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329F 10272 bytes
SHA-256: c7fa428b2f4754530e933864858c01bf02b4619cf9ba065a1fedf70e3933e507

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