Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3dbc9056ecf41b…

MALICIOUS

PDF

77.1 KB Created: 2021-10-04 09:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 34a6250cdcba3a14dd749cfb34d84942 SHA-1: 4bb826059d8bee7ff5b2844c98c848d16152c0fa SHA-256: 3e3dbc9056ecf41b095b686c19540e341ee0d869d45582b93ff6e04841b8d8d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to link farms and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://laborke.ru/uplcv?utm_term=ocr+searchable+pdf PDF link annotation
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16159d2ff7c569---ninaduzolugodujuwijeg.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/1016436494.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/11068319566.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/51601471917.pdfIn PDF document text
    • https://www.alliance-educationsexuelle.ch/ck/ckfinder/userfiles/files/gurewosagirawopemi.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/58916497120.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/tezepevif.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/44835913430.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da67b6547c---97804309352.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/17056230042.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/ketidibenodakabodarojama.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/ratokanubimigubateb.pdfIn PDF document text
    • http://kelvista.lt/images/files/69635636009.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/61812295481.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/55082032466.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/fofoxazoki.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/6503322234.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/32248409394.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/zamipawugovutu.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/nubafuvowalojufosilo.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/91048398837.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/11387001692.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/70096783129.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_off0000c3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CF 10468 bytes
SHA-256: 86f38f8b3170b4626a683c671bf199c28554caa61338d54a045f98438a489983
font_01_sfnt_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 19512 bytes
SHA-256: 5155cf6751fe1118d0a9f7597930a61a4d062893829d0050e546d4dbee3909fb
font_02_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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