Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67df597bc16e909…

MALICIOUS

PDF

72.0 KB Created: 2021-09-12 17:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7f53ccde157974561301f17b235e36ae SHA-1: 9b0f84bba77f43c596a17b7f65a154a31defd0a9 SHA-256: e67df597bc16e9095e82995f2993f9122dc160215ce17b21b4a3873d2d6702b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malware. The presence of numerous external links, including one disguised as a Minecraft APK download, suggests a phishing or social engineering attempt to trick users into downloading further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://superlitefan.com/uploads/files/regovowipudazogifezid.pdf In PDF document text
    • https://10s317.com/uploads/files/202109041641369692.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/waruxabelixitoxota.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/76268789114.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/89406132092.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/tugegajevowemuxij.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/mapal.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/29442229447.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5d97b0daca221d8f723bf75ed9d7b1e9/xivudadiralobu.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/febopojasagusiruravafeza.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/xasolivebasalasi.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/99338997944.pdfIn PDF document text
    • http://metall-press.ru/files/8425704875.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/201821c2394a31fa021e6514d073c80e/32292487703.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16310572656514.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/kajanosupurotezexi.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/linazuzej.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/89156775987.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/pogiwebanazesaw.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/gatijijezijodobalow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=builder+for+minecraft+pe+free+apkPDF 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_off0000b5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 16760 bytes
SHA-256: 025052a950ed301754b0fe9a6bcd56ea9acc1c49f9bc661f05c1de947e4a4ef9
font_02_sfnt_off0000f96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96E 10860 bytes
SHA-256: 958381cb55fa1a9503f834297886e1832181347ac3a5859200bc69556164c46d

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