Malicious PDF — malware analysis report

Static analysis result for SHA-256 046e57b9dd673368…

MALICIOUS

PDF

92.7 KB Created: 2021-09-07 04:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 81c43a8563d1a7591e10813dafd47473 SHA-1: 315df5fb1a372097db324a4cb49e6c17a4e91d1d SHA-256: 046e57b9dd673368111800d638f5d160444e7fd7c24c6f0c8f851e50c3a1938e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49737746671.pdf In PDF document text
    • http://progetec.org/userfiles/files/42508366256.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098bdf361681---gavoxomunaxalerezoga.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/lakevadiz.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a26975ce---19839364460.pdfIn PDF document text
    • https://grancom.by/upload/docs/ribukugufofevofar.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e5a688ac821---luzunariwabasojasokasir.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/a7f9e76823f280bc213233c37ff64585/minegazesulawefivimagorex.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/bejopezajujunolofat.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0658302c4358f00d9f00c464adc1550b/votogunuduxejomijaroxorob.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec876c8b9---kezibuwul.pdfIn PDF document text
    • https://izometal.net/mm/file/91242298927.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/duferoxopijasixobizefe.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/bufugezuwatu.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/77567223281.pdfIn PDF document text
    • http://vinmexindia.com/uploads/15146233622.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5043d863f---tiwowajazowakaxugaxixu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/afa920bc6f3a79dcbed4c57089eaad6f/21356520379.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa370b99e5---xerifulerokamelikur.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b2d77e8b2---31861759402.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/zatujupaduxupopegew.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/995f13072df184c92f46e91e7a072a87/roriwudo.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/fudugenetebofusoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=miranda+rights+philippines+pdfPDF 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_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 17784 bytes
SHA-256: 168e955c7a0546e6d109bf1976b4f7c09f3d03062885c333611ad5ab09fd27e1
font_01_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 10652 bytes
SHA-256: ed71173679f2ec8b98f4a049461e72d4143de5f42e9c4bc65dcbedf9d0250031
font_02_sfnt_off00014cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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