Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adc5bbf54ed9916…

MALICIOUS

PDF

69.9 KB Created: 2021-09-19 14:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0007cb9f02ea6fa91a2b3fe8bfc41700 SHA-1: 8ea6cb52a93f8d9adc413c03870c1ffcc3a8862b SHA-256: 6adc5bbf54ed9916d428a7682ed0da1d8a99b8a915e1e26a1e1ce9c4eec510b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious PDF designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a3942d2da---bodaxetisoti.pdf In PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/75774186469.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/xobinagakesiludav.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/17305823915.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/9141835021.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613894a8b4f60---rasosutulu.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/luvuf.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/59480841743.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/muluwen.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/wadij.pdfIn PDF document text
    • http://4rrecycle.com/files/file/45808387322.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/kugolozevawoxoxabavomika.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/takigebawetorubulodalokeb.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210916142231.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/22201796793.pdfIn PDF document text
    • http://mayjack.com/upload/files/bikozufixekuzepowiludad.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/27386473274.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/4739332379.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/xamotudakobatijijivenonod.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/jokajoroxuxanip.pdfIn PDF document text
    • https://kermanrooz.com/img/files/zamesapapurip.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/54867875540.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/21322560761.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/5492495622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=after+we+collided+movie+full+movie+freePDF 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_off0000b3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF9 10436 bytes
SHA-256: a56f65452d20a579bebfd327daf42c63087be15938830f5ae3b1d346051b6fd8
font_02_sfnt_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 15128 bytes
SHA-256: 1776e77fda6edaf83afa751c99e0cf14d57c1aa212cade0b8f7f410982bf2e28