Malicious PDF — malware analysis report

Static analysis result for SHA-256 4358631dd274ce9e…

MALICIOUS

PDF

89.6 KB Created: 2021-07-01 10:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a161dfe9ac8e1744a47f169e6c9dece8 SHA-1: 0b417f278b6d04a53207ae1ecfdabc37f7b2f8a9 SHA-256: 4358631dd274ce9ea3d4253a866f79ae6b25036cff9e5247d2dc3e23e89366ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous heuristics flagging it as a link farm pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm suggests the PDF is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://drafthe.ru/uplcv?utm_term=red+bean+and+corn+salad PDF link annotation
    • http://amoy-art.com/Upload/file/64237510167.pdfIn PDF document text
    • http://teraval.cz/res/file/79188595742.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/50318794033.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/20b8065176acd63a2ae48616f8c128a5/zupevesoxigelanuw.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/12297591154.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/gaturepuwagak.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/xixariramebonaxupa.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210611_3E86F5BF19143FCA.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160adc3fccc0e0---leboketinuzotixezagif.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0744203894---joraxoravijirunole.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4e01cc0fb---59570434197.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/61502582214.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/12371576590.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/16224524301.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e449eb93b---pepulame.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/33048506867.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a696155f---85498452841.pdfIn PDF document text
    • https://artbynela.com/uploads/file/vigupemiromekelodotele.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8a2408c0c39587a444e2bf06c7d5cb2b/nolokuxabavuvorubifolus.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/laborafigonebesaxobifa.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/dobowese.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/baberosi.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/4118464648.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_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 10356 bytes
SHA-256: 90a3316c6e3f35edc54755ab8dd8e2b79a9297b9fef99652340cd5213a5db93d
font_01_sfnt_off000111f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 18100 bytes
SHA-256: 7fbf690bd41eac723d78bb59d773d7f2327dee4e305ca32f28fa1059902cd234
font_02_sfnt_off00014150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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