Malicious PDF — malware analysis report

Static analysis result for SHA-256 459c76d6ea364845…

MALICIOUS

PDF

75.3 KB Created: 2021-09-11 22:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2858187e88ac1cc78bf25989a0e5d82f SHA-1: d215a50ce86ea610a3290432f31c40e18c18ee2c SHA-256: 459c76d6ea3648455323769a3123280ad52f9eb45e5817e0e035a9ec844704b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious domains. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest an attempt to redirect users to harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duwerazetisodi.pdf In PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/49903589035.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/35343475135.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/49973550216.pdfIn PDF document text
    • http://rvhifi.cz/files/file/46362025730.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/83016378428.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/46048899527.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/32730973309.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/91512386241.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1630596819.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/midesefezemusanaxibuxilad.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/16839337082.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/21964872807.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/66028236442.pdfIn PDF document text
    • http://hkalc.com/userfiles/ludinakilelu.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109070647246681.pdfIn PDF document text
    • http://www.toptehnik.si/images/wokefubikise.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/gexakuposidag.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/kuwalefegikofobugolagu.pdfIn PDF document text
    • http://mrybalko.ru/files/widemidizitetigu.pdfIn PDF document text
    • http://bienbao.net/uploads/files/basutonukojafonozagiji.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zomonumelax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bus+simulator+original+modPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37F 17224 bytes
SHA-256: ff650a0dc6d346e692ad3ab07d89e81919edbd225e56275683f6a1f697b626e3
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 10612 bytes
SHA-256: dcb6465c89bca670fc1ded5a26b98973dcdea1986ae16d2329eee730023ec935

Open this report in the interactive analyzer, or submit your own file for analysis.