Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c220b168b802d46…

MALICIOUS

PDF

93.5 KB Created: 2021-09-16 10:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6f738f1ab1abc7be6329dd67e1b39060 SHA-1: d325b1f37190221f71c5e08e03740449cce70484 SHA-256: 8c220b168b802d4672016789169aa66139e71f36907c4eb5c3b3af42077f7e45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://poddertradingandindustries.com/userfiles/file/bitaralobewizelut.pdf In PDF document text
    • https://amigo-shop.105h.net/upload/files/waseratirimurijorekef.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/riseluz.pdfIn PDF document text
    • https://loctra.net/userfiles/file/pukafisofusuvel.pdfIn PDF document text
    • https://km2804.com/ckupload/files/dejasipafap.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/dukanobewedopimuxosepi.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/gijaluxotewivawugusemere.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401ad296aab---jopujonejagiwupajedetol.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/gavefumosefes.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/zoxivarepivu.pdfIn PDF document text
    • http://feg.vn/uploads/files/zigifabavonepovufulov.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/petujuw.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/jutok.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/difamoruwonimonewo.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/dubajogutowijuxomo.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/56648896632.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/tabogubobipinobavom.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/boxezotutefumomeduri.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/8iv2o8nuroutdtfvt1b1n67vr7/xowamofatepejapofudoxere.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/19743435780.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395274cd5c6---31130571486.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/borowofogiribajunipo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161315bd9e1244---56712076250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=iplayer+chromecast+iphonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 19120 bytes
SHA-256: eed1ed4ddda65c4002d6c665a5c98a8a1c95d480de68920028337fdf7b14b4f7
font_01_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15082 10704 bytes
SHA-256: 979f5322927afbb2d607e495271290777c598bb00b1e67594430932c36fa37da

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