Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d3cb489052618f…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 00:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c7bb0fb28219b4d64452b8344e2e552f SHA-1: c0a1cfed3ccc3fc513a74c08e0274cc7873de09f SHA-256: 67d3cb489052618f5b188798bb043506d019f7abdceb888fc154fb198230e7b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://a2designbg.com/userfiles/file/8742657636.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a223027fd51---66254628348.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/45245188954.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160732ab90c1e5---tawogamoxupuxipedi.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/76600576119.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/82916952153.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1818f639db---pulatiduvokarafebezosu.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/mijogupuboji.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/97667877927.pdfIn PDF document text
    • https://majubesar.com/contents//files/72053558217.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c1423e4b---28240775450.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/dozubimilawexokebulufo.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/61766156614.pdfIn PDF document text
    • https://andrejc.si/files/file/51725965323.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c38a8d22c---45892770795.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078105699f27---96000240523.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/vubuzab.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2884e148f52835f374185c77b37c8975/jimadorizuvaniniroxu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/3ddad7a2b82869f88c0d88a181c19f85/43593756479.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/25005077370.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/fudodikurowigati.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/hgvc3v26h3vih7ukrvk16ehfvr/rozuvatuvarap.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/govorawotefebopapewafe.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/df9ad989fee8084693f3fa72b6e9cd25/duzoxedaba.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/56873647700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=khasiat+bawang+merah+untuk+kesehatan+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_off0000d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 16708 bytes
SHA-256: 469b3f67c0e2de8cf171216c671a4d776150a27399d64bdfc89f3709f76f6813
font_02_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 11188 bytes
SHA-256: 619d8807ab82759e29da26c5e7e342ee2ae3aee6a02259abbf75d60e0e1e0b33

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