Malicious PDF — malware analysis report

Static analysis result for SHA-256 064c1ec2fb8c5aeb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 17:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89f845ceac417ff35d65d2f8edb704a7 SHA-1: 14ac96549f8f1479acb01b4a839fab041d5d3b1a SHA-256: 064c1ec2fb8c5aeb1c936446639e985303d687b80361ea8c06e3c46515ac31d6
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not fully analyzed here, further supports the malicious classification and potential for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://synerhu.ru/uplcv?utm_term=meme+generator+android PDF link annotation
    • https://4wheelchile.cl/admin/uploads/file/45482061320.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/xitinarajekopetoze.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/kulisemonunafiragitafix.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/18705097141.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/muvuxutetixizijusuzuma.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/2259208580.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/14610620168.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/xagedizusolawobev.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/vivigerasemuxamipulavu.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/58360029150.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/rujivumopofusawesoleniv.pdfIn PDF document text
    • https://pkbae.rs/files/7002645001.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/98566210301.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/moviwa.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/27006219142.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/90645237067.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/72557215393.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/79705337079.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/89860244691.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/buvewomumotiwomovidarepe.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/mulijugemedonofipazapifox.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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 18132 bytes
SHA-256: 259f8cd6a81dfb20ad9b4076818613894e8e59551df365b31863384a8aed6d23
font_01_sfnt_off00010fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F7 10368 bytes
SHA-256: 8ef55b85955ce1af1b159ac4ec4133a69e4c383a17f1bbac6cfbc35676c9803b

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