Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c89de78be32754…

MALICIOUS

PDF

76.1 KB Created: 2021-09-10 02:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8f5c37175abaf44bde9f431a215d9c8f SHA-1: 2bbd431ca6ef2d3f690204316ec4e71a46debca5 SHA-256: c6c89de78be32754e53ac05a80c607ff0bd57a84c93f4c89845f627b50ddfb60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external URIs and is described as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=123movies+knives+out PDF link annotation
    • http://halanmilk.com/upload/files/zikarekotiritij.pdfIn PDF document text
    • https://kaisar168.com/contents/files/remezujix.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/kilanerobifet.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/gilazunerasekanugem.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/zifobiritewinurinijarus.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/56179123219.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/sakupirawig.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394414d7d48---42823060532.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/99696876582.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/74251072832.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/rirosajedorinapawavenora.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/81814177087.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/bepabikin.pdfIn PDF document text
    • http://protok.pro/upload/files/30398134942.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/kifubixuduxubawumiditunu.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/86888969192.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/gigijoforamitapav.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/jomurigidaf.pdfIn PDF document text
    • http://askort.pl/Upload/file/kabenoruxinefozovabemalun.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/28602798890.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/3240140616.pdfIn PDF document text
    • https://ijpdua.com/contents/files/gejamananidap.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/15699082906.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/radetonadosa.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/jazur.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_off0000c2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CA 10464 bytes
SHA-256: c00df2002f9f5cada550e2866e89ea14a5df7a50931792dede0475c9b8bf7106
font_01_sfnt_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 18292 bytes
SHA-256: ff0d9e3bbe17abca13d5703d72f53e593327fb3a4d206146c2ccd25a07fcfcfb
font_02_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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