Malicious PDF — malware analysis report

Static analysis result for SHA-256 609155bb00e1e2b6…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 01:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 20407ae6b076b09a4e618fbdd98a909e SHA-1: 7fddd4863ceb1f7cdf9a25796b1d7b257f1bcb2f SHA-256: 609155bb00e1e2b66c295c98a9596bd4b12068199514f83a2c6ea24ee4aa5c5d
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/6bf52228d813f2368a76c5707f9b7f68/79778204303.pdf In PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/71b9e7ed2550733a41de38e5dfdea07c/vaxesidafiwaret.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/dovifeseletudotabok.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/sijirusobesebur.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/93889275055.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161408ece14e55---satikar.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/vuzevodox.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/xenunesotunevetozejake.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/tokoro.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/18616413533.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/8794939221.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/fosiwijolara.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/72154980220.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161340d788694d---vekunizovupenavuzesoxotu.pdfIn PDF document text
    • https://flomogroup.com/upload/files/52092133966.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/giguxunizefesuto.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/jebijuferovufefiwedezosom.pdfIn PDF document text
    • http://jn-zhsc.com/upload/12430632546.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/laxojusugexirixege.pdfIn PDF document text
    • http://ubest.ru/images/file/93519929246.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/671gj3cbjkmddpviq7eiuvvve3/lefegukamosewazev.pdfIn PDF document text
    • https://12tiga.com/contents/files/bisewanubiluribaro.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/11772740554.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/jekulorurizudifajomem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=parallel+space+64+bit+pro+apk+downloadPDF 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_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 18032 bytes
SHA-256: 68f311ef675e0bcd42539603ca3bfe1b111a1033d0e2b6b29b8a946a5901f27a
font_01_sfnt_off00010b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 11072 bytes
SHA-256: cf925cbd7c5106827c1a92a7ba76ed84c5039821b043ec2aa04cf5991f896c67

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