Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17532610b309a51…

MALICIOUS

PDF

74.1 KB Created: 2021-10-02 22:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ce462fb303d6ed790e805c257dc1ca8f SHA-1: 8f5271dadc7dc9e0f65cfec00472680a62687552 SHA-256: d17532610b309a5160ca3532631d3eb1bb249fd6c7956aa3d9c4ec72c9856a5e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The PDF structure and embedded content are consistent with attempts to exploit vulnerabilities or deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://custom-mugs-factory.com/uploadfile/files/46697954000.pdf In PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/6228192734.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/60504535332.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/56927388640.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/woxujesiwizogutozaz.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/79833923884.pdfIn PDF document text
    • http://hak-al.com/resimler/files/26356790441.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/nixemavinawe.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/lexoluzowipatamiterizam.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/konaroxoxumokukulemilado.pdfIn PDF document text
    • http://jph.kr/userData/ebizro_board/file/18669961014.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/46216098644.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/watawarujujidigab.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/99685643387.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/36443881961.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/93824965484.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43518927043.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210917_133752.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/83409447314.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/kabajax.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/kepibag.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/davijulibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=anything+and+everything+synonymPDF 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_off0000b79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79A 19776 bytes
SHA-256: 384fe03894fe79e1ffb8c2e12da02a002450a067e837aaa4a2ef9cf6a5f30bda
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 10808 bytes
SHA-256: c2d8621735800d773b4fae49991a62da548adcf1e3ca77c0e855a8d8f938818a

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