Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ed6d1db39fe41f…

MALICIOUS

PDF

81.2 KB Created: 2021-09-19 20:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 659eb2153171b4224628d409b8f87368 SHA-1: a0564fff8da7ab39fa9cc0eccf9007bda606ab8d SHA-256: 94ed6d1db39fe41fa3f5a53418835ebe3c5838adf9590c84d5e3d2d8720856d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://qiuyutv.com/userfiles/files/20210906042212.pdf In PDF document text
    • https://gulamanis.com/contents/files/48858742022.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d0b9a7456---kajutisot.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/18876956175.pdfIn PDF document text
    • https://labelmarket.eu/data/file/wuwimuguvavudukezilixe.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/43928475238.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/supivexaxevulorisekumulan.pdfIn PDF document text
    • http://gibisch.info/files/files/jimemegidukabotelizovodet.pdfIn PDF document text
    • https://o-dance.com/upload/files/23299508332.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/xamiritu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16143d9f5c200b---30619651106.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/neret.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/nobixexebuw.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141c49375926---dodezitur.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/26980178175.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210905180302650.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/42823736669.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/6760320579.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/muxowexoxare.pdfIn PDF document text
    • https://partnermind.cz/images/files/71165470718.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/kegawap.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/33590970205.pdfIn PDF document text
    • http://ledins.lv/cms/file/dasimijifudo.pdfIn PDF document text
    • http://halaljones.com/uploads/files/54686863723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=android+app+for+weather+undergroundPDF 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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 17084 bytes
SHA-256: a19736f6d9575ce8d2a098703fec0acc05bc157852050de31014dba79772d28d
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED3 10728 bytes
SHA-256: 25d65952b803a405ace503bdca76e5594dc6b5fa6890d1926b8f56cf450b7237

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