Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ce5c8a782fdb4d…

MALICIOUS

PDF

76.9 KB Created: 2021-10-03 02:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 96a1223821dd1926b69abc9f67cfc1a6 SHA-1: 91d00c73afe7529b2af730683d9378d8a7400240 SHA-256: 94ce5c8a782fdb4dd9f11f68a8ab10ecba590a431a7bf4836394fef7b2a3d797
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious PDF detected by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URLs, suggesting it is designed to download and execute a second-stage payload. The presence of a link to an IP address literal (127.0.0.1) is unusual but may be part of a complex redirection or obfuscation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=missy+martinez+scouts+guide PDF link annotation
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/5d4fd93935ebc24caca24187758e5328/89333630352.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/68780889134.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/56032924909.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/35819951673.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/64446542843.pdfIn PDF document text
    • https://partnermind.cz/images/files/4015014086.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/82199803421.pdfIn PDF document text
    • https://bfull.ru/uploads/files/80614261338.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/87379221556.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/ziwojujatasaremegaf.pdfPDF link annotation
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/temazovesuwerumiraxesusog.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/59611796242.pdfIn PDF document text
    • https://miminku1.com/contents/files/34583025082.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/vavupofesuwez.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/11841437247.pdfIn PDF document text
    • http://agenturamotivace.cz/uploadfiles/file/vapasexerenenabobar.pdfIn PDF document text
    • http://jarosi.hu/files/file/40663771136.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/69175311450.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/36244861619.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/9609927885.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/14414545356.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/61277452938.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109122309066267.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/tugarumu.pdfIn PDF document text
    • http://coumert.com/images/file/jolibajox.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613c080539189---xovujuzizofe.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_off0000c258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC258 10936 bytes
SHA-256: 2429179da0538d767b3981581a299fc081d9141724a423e9c702d840fdd00495
font_01_sfnt_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 18764 bytes
SHA-256: 01ddc625c11d1cc91cf655677c7292456977c6dc6591421bbdfe5896b3946d25
font_02_sfnt_off00010c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1