Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4f08db66140056…

MALICIOUS

PDF

81.1 KB Created: 2021-09-20 23:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 225c674bf429460c8276a04d5b702e3e SHA-1: a3a19353d53bd14b7ce1dfe6781811d3916a83fe SHA-256: 9d4f08db66140056c809015d361367aa073ec62e412c4b31764fcdd18de50d0a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting, suggests a link farm designed for phishing or malware distribution. The document body was unreadable, but the heuristics strongly indicate a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=write+external+storage+permission PDF link annotation
    • https://reitinguok.lt/userfiles/file/wewidap.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juxorekixebelunu.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7cb2c347---89296837316.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/4095022360.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/76777847194.pdfIn PDF document text
    • https://ewt.cz/res/file/wopuwujizanarodogo.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/16062156511.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1631713572981321753.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/wivugorufakagal.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/vinunuxaton.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-9///2021920152325857.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/76230353136.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/wozetamapum.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/39189200986.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/31302187582.pdfIn PDF document text
    • http://jaqalsports.com/files/file/90439606967.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/11286342790.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/9659ebd20fe67987711f986508152142.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/40494797681.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/80349832542.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/wunuvusitajibozujuru.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_off0000d488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD488 18972 bytes
SHA-256: 2ba189e2e110f19b57f341b5697a58a8a489006c23a7d239bc3655d35d50d861
font_01_sfnt_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 10692 bytes
SHA-256: 133b91018b3ac452dbba1a8e66ba7e33968ffea66e7a607cebe73ea30ceb8d33

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