Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e47c6af6ce225c…

MALICIOUS

PDF

79.5 KB Created: 2021-09-12 05:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5e400ec394d42f1fd688fd960b9a21cb SHA-1: e9509980f07fcafbcda264ee0faeaff76335d16c SHA-256: 63e47c6af6ce225ce1db40569939b17d136982db070ddd9ba3546083c5b3b91f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that point to disposable hosting and function as a link farm, a common tactic for phishing or distributing further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggests a malicious purpose related to SEO manipulation and user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pixomot.ru/uplcv?utm_term=advantages+of+interviews+in+market+research PDF link annotation
    • https://hmanagement.net/userfiles/file/26162726455.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3654_20210904132533.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/regewufugelebi.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/nudelidururubewujutup.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/fee1eb79aa11e4c83b60197ecd276667/jojukirijakorenes.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/fegurunujidol.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210912/file/16314026229010.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/letutomeniwujenorusi.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/60364469880.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/75000508352.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/39357948136.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/supedab.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/falejivorame.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/zizatabazabeg.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/25064004966.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613774ff7c988---lebakunabosopat.pdfIn PDF document text
    • http://gaudi.tw/upload/file/rigoxizefavokamegotugi.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/mogij.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/57557495265.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/59065094203.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/61733355246.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/629464215.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_off0000d56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56C 16124 bytes
SHA-256: f6bd4decab3658ad48701d2f9697319390265bc3f9c9fdaa8c90af414cee13e6
font_01_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 11104 bytes
SHA-256: b1edd89a0cb9021097d0a801d6887e41895a2265479a0ad0ff479c9ad2a2bea2
font_02_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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