Malicious PDF — malware analysis report

Static analysis result for SHA-256 214d227597e5460d…

MALICIOUS

PDF

86.7 KB Created: 2021-09-03 08:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bd6512c28d73222c0e6d4d0385a3febf SHA-1: cc7ea021ff7d67f06fc8dce4b2190da86c8b7056 SHA-256: 214d227597e5460dd7beb6cfabdea23c4d48f22907ca941dc3f5818f6088be5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URLs, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing or malware-luring nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=hsk+level+2+grammar+pdf PDF link annotation
    • https://xn--nmqu14inmf.com/upload/files/loxemo.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/lovuxupa.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/xipopozopubutagavawa.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbbf45d2f4---deseduloxekuvagegimipi.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1232c50a3a---volerosipekek.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/94211638757.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/g4m54umbatea4vqltdatnn42rb/jenuganivokixuzog.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/pirivumekug.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/32147468346.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/67622224970.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/24dg68jrbo88urol7aku59442r/bapodulu.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/fudobifadofutufodogujokam.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/10758764083.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/53325399406.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/nadabipemepigeturujin.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/cc08df025d537d1b0d3dfed06284d57f/33517305914.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/lokolafukuweniti.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/87491600467.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/porufogozux.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cc5ec3a00---xixosonixuradag.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/berebunabudoj.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c556c5e33f0---radegodozekik.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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 19588 bytes
SHA-256: 055c875acbdff3fee0996da55e487742339ef63efb99dfa9818da8138e4a4e5e
font_02_sfnt_off000134f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F6 10696 bytes
SHA-256: a13997915d4c4b60b37d0e69b5a632ee2226d4af2272799d8b46da29e11439b9

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