Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a6ce72f29d05dd…

MALICIOUS

PDF

76.4 KB Created: 2021-09-20 23:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae88cf09197d5dae8e885cb850fe6447 SHA-1: d434f87ddd9eea2bea44dc62b32532e59f40ac9f SHA-256: 32a6ce72f29d05dd68c785ee21ea23ae70c1aa4d8733324781aeaae219c16b30
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic analysis identified it as a link farm with numerous external URIs pointing to various PDF files, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the link farm indicate an attempt to direct users to external malicious content, likely for phishing or malware download.

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 https://drafthe.ru/uplcv?utm_term=modern+warfare+apk+free+download PDF link annotation
    • https://isosklo.cz/uploads/ferobojobet.pdfIn PDF document text
    • https://subarini.ro/mm/file/94702422219.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/51064471960.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/sosefenil.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/09eivhe2a4h4v2pis6j5dug233/40545911558.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109080400576376.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/84917470643.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/dipaputuvuzuvelil.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/11894727768.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/41283681562.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/bitovazuxawuforulogodad.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/81645841349.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/59501500245.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/mikatogenopojawogekosuxo.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/vusefim.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/87960585404.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/2918299549.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/kurugenegovosaledijikoke.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/28185000972.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132709d2a665---56678952226.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/wazuvipu.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/21426021758.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_off0000c496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC496 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 10304 bytes
SHA-256: 62c1f1ca6d82a20e211074ef6928ddaac1a910fdaa1f69bc1816de85d41f66f1
font_02_sfnt_off0000f405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 18472 bytes
SHA-256: 0aa40acc01c0e8b1867847d24ebd4d4921adca71b5fb9d41f98c5b14df4173dd