Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd011761acf81f4…

MALICIOUS

PDF

73.0 KB Created: 2021-09-11 11:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8487d9529f2f8e9999de686969128542 SHA-1: 07d3e20abe4f86e3961f1107a382ff1777fd5567 SHA-256: 3fd011761acf81f44b59fc5a62168c4fd8052d31ab154d630348e29e1a2f0bee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, including one pointing to a raw IP address, suggesting it acts as a link farm to host further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 http://dotbamboo.com/file_media/file_image/file/zujamizokubudeten.pdf In PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/43661853930.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/17855961152.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/fobigijakakepipatekuni.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/43278581208.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/78511480856.pdfIn PDF document text
    • http://poliinc.com/upload/files/37513499071.pdfIn PDF document text
    • http://biomehl.com/images/content/files/8512588785.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/zefijogekulanufa.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/79881475215.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fetobupukim.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/wuzivotof.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/33248737166.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/65751690359.pdfPDF link annotation
    • http://life-homeshop.com/asset/uploads/files/sojos.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/98040675931.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/vigowosowaguduluwisetuvuk.pdfIn PDF document text
    • http://gibisch.biz/files/files/bogozoxujum.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1d33705de---sewuzulotom.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/50340138837.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/19657124613.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/xujanuweloz.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/15271583850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=maps+minecraft+pe+downloadPDF 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_off0000bd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 15972 bytes
SHA-256: b0128ca06c28a7dae100c6e535a33bbfe87816e882d49cab017368be3887f103
font_02_sfnt_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 10860 bytes
SHA-256: 2e7322602675ccab4867ceabde2c453d4bcf86473b91e71b8098162378a2c606