Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fcf98bc1bacc6a…

MALICIOUS

PDF

77.4 KB Created: 2021-08-01 07:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b5de85e16f89284a790c3264e1ffad53 SHA-1: 0866a66c29f21b4a153b1dfd1831b68f0cdc1123 SHA-256: f6fcf98bc1bacc6a1d51b227f7782016684a8869ddb6d588999ecd05a5836bfa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document is classified as malicious by ML and ClamAV, exhibiting characteristics of a credential harvesting lure. It impersonates an MFA or one-time code verification process to trick users into submitting sensitive information. The document contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing campaign aimed at stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 https://huntic.ru/uplcv?utm_term=how+to+lower+volume+on+adt+safewatch+pro+3000 PDF link annotation
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdae6f70d47---35594696802.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/96160333555.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/v522tpugk5d6kdp8go9gf39vuk/fitobifusurowoxu.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/pasosapotebetowofigukuso.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4039e83e90---zagozezepexozenatiribax.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7j1oj4uj5nvq5bh602uv7ffke1/voririnenejesizavedoba.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5a867193---naturudexobetit.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/26732761126.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/40244492560.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070277877e87---begudekesezirufideki.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/87367503761.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/21044d5d3c68fa53b1f15cd61bd6ce05/54636326247.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/levanemeboro.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/4k6fglq25hvv5tpfuncho4oulq/47867838529.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/7758222931.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/4355878656.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/o6e72e8bqrdtits1jbpcctqf4d/legireliwaput.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/vigamemuxejabexolirafu.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/70683181316.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/ea654fdfb1df9985828cb818ccf98b6c/vaniwitimojib.pdfIn PDF document text
    • http://arlingtonhigh1960.com/clients/881088/File/31880345053.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf426ccb41f---bofumibawafakokarozilipiw.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d23cb972e7---nezujopezu.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/91348476617.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_off0000c783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC783 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 16676 bytes
SHA-256: bec4fe09022d8b0ae14c33ee74b2c79fb867d46d246e4313ea6186ddbc45508f
font_02_sfnt_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 11332 bytes
SHA-256: 80dc5e4bbe7316cd38e28995d107b13a2e3777da922acb73459864767f433624

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