Malicious PDF — malware analysis report

Static analysis result for SHA-256 514303af9af4c617…

MALICIOUS

PDF

87.3 KB Created: 2021-09-04 10:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d3c93e9d55ea6335dfefafc4167c9d4f SHA-1: 3c7f06a7bc1b0e18d8ee33e4515200f8f2fec373 SHA-256: 514303af9af4c6171661bbfe6a7256f54c1f48ae7adb50c7a792789e757d2ac5
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Several heuristics point to the document containing a link farm hosted on various domains, including compromised CMS uploads and disposable hosting. The presence of external URIs and a raw IP address further supports the malicious nature, suggesting the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 http://oasis-inwaste.asia/files/file/27355413780.pdf In PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/botezuwozimefujepodasubim.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/21120384402.pdfIn PDF document text
    • http://htcable.cn/d/files/godiwewitu.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f34774ecd6f---98098692811.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/tinufutewipumif.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/63575473086.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ca49428441e6db4c263354ad78f40aa8/padivasiso.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/likezuki.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/5ff4577530ad8476a8b4572f5d35844f/75029356428.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/36986369416.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/18203646582.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/33978515888.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/podasojuvikafup.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3cd1c24f75036e3cee074d1f11614612/buviguxukijabuv.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5b2350131d7dcf078f0f670355af8ad5/gibimugam.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/7motcai3luhrv6jqa6jt2k2vmk/tanukaveduwejozil.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/62629205172.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/wujetifunozo.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/zexotomibavejoxu.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/zasofazobuvuvexaxo.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/powelukelul.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/49621754741.pdfIn PDF document text
    • http://140.121.187.38/ckfinder/userfiles/files/7643870543.pdfPDF link annotation
    • http://trustycctv.com/ckfinder/userfiles/files/95783457704.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021072003295849522.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e78771b74fc8e1c9e447c66629b6ab62/27123109358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=vicks+cool+mist+vaporizer+manualPDF link annotation
    • 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_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 10820 bytes
SHA-256: 4f71f40f3aaeffed19a7f8052e2b5a6a0608ae53df9821a2f9d52c886d618bc0
font_01_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2A 18020 bytes
SHA-256: 9b9331f99982485533f5e3833594ac48ed903045e4536030ae93aa9df7517ff5

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