Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a297abe30c33e8c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 04:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93eed87ba8a1bb18fd70413c44e1525a SHA-1: e84ee42cd02f8b1f13824dbe865ac8ecfb6f1a29 SHA-256: 6a297abe30c33e8c8e857135dd140eeb446f08f7d1336c147305a9719fbf875d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, with several heuristics indicating a link farm pointing to compromised CMS uploads and disposable hosting. ClamAV also detected this as a phishing trojan. The embedded JavaScript and external links suggest an attempt to redirect the user to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allytemp.ru/uplcv?utm_term=how+to+scan+code+with+iphone+11 PDF link annotation
    • https://alihuata.com/userfiles/file/jopijugabukibofarilusu.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/kiduvapelasag.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/68817574064.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136aec83afd3---rubepigadigopaka.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/sobedukodabirudiminu.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/3298820686.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135cd7711720---xejavulilokafo.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/20297589696.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/jaran.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/kubep.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/45333074584.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/jizinezowapokoguze.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/xolafufokatutirupovipopi.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/gefudetaxumojifusofenile.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/bisekufebarobidupaz.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/20024219757.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/42851747888.pdfIn PDF document text
    • https://nada70.org/userfiles/file/rapedukelitatugopobefe.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/81446598369.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b838927271d0706e6ca040c560136c8c/kunasogusotezetuba.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/tugisigaju.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/pijefiwapepuwofenupe.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/fixila.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/30599328432.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/14688972504.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/48567850484.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_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 18108 bytes
SHA-256: fe8aa964df3c09363fcdd1c6dcf0134418eb4bf34176411c17d3b3414819acca
font_01_sfnt_off00010aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BC 10596 bytes
SHA-256: efb5b75235767c6ff07f6edb90c8802eadaf457c57dbab6ff6334e9923ddfbd1

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