Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c06214b459f05d…

MALICIOUS

PDF

87.4 KB Created: 2021-09-18 15:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9afd3d99769d07556573ee7ac49183c7 SHA-1: 724dba884a65dec04a131d88a5b5c843680f30e3 SHA-256: 57c06214b459f05d1aa94141e668881cba63d9e7b0e5145429bdfee8e022fc91
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://funkyspa.net/ckfinder/userfiles/files/bilara.pdf In PDF document text
    • https://megalight.lv/uploads/files/47401933178.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/wutasapazunudotudol.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c824b49929---wunajutuvakinolaxadorimu.pdfIn PDF document text
    • https://camphacement.vn/upload/files/vibadojazobure.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/towujigozagit.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/pebaforetij.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/39256830479.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/061549029214.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/tedanepinogepabew.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/fixozawofurenokudaba.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/20270240929.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385037c20b6---ditudujovajubunusi.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/98536643537.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/zafekuliv.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/6490645420.pdfPDF link annotation
    • http://hurtowniagrafit.pl/userfiles/file/18339075433.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/66560020218.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/40306629155.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/97177490784.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/jakurazi.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/25397944335.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/gadimu.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/juvabirefukigokepep.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4b8efc61bf290dd0c4b397249a4ed8b2/30550891641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=harry+potter+hogwarts+mystery+mod+apk+unlimited+diamondsPDF 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_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 17620 bytes
SHA-256: a64d4f311aec5b9a88e0ad0aee2c2cf847318cb003877c716ae85692b37f70f3
font_01_sfnt_off00011d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4B 11220 bytes
SHA-256: b6dcf7db828175489a80dbff18e1f57e9dc764bf0988fe0448f66b0686d3cdbf
font_02_sfnt_off0001373b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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