Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d1e9d312c4403b…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 13:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d7d8e116ca2fd63f3052ab7d3be04203 SHA-1: 1f3fa79a743f92392d0f295763214bcbddf5ec31 SHA-256: 80d1e9d312c4403bb227ed06ebf9fe6f99efb287951759c43da7ef612b755a25
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple disposable hosting domains, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and a link farm on compromised CMS upload storage indicates a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://bishnutoursandtravels.in/userfiles/file/wabikowitanaporadezeko.pdf In PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609885612d565---jonobixi.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/rokokuwusojatus.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210728170751_lk8rcd.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vowuwunozazez.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/65784043839.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160839b705cfa0---gowigoja.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/26499571797.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/bixalunolu.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/82861034035.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/sofuv.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/35466979453.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ede89ef6---zofimijanilagulalesevimuk.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/8mi2krmvvu14moa92hu8pn67j6/4383354890.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160730bb42cb0f---43898033383.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///memof.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/sowukokobejuxejavomupi.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610724a5aa181---20960995939.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/31152482186.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/ropuwezojowapide.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/gizofosi.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/buwiduxikigegedizi.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/wovakawu.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/dabowagapudemalud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=picador+de+legumes+manualPDF 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_off0000c3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B1 18136 bytes
SHA-256: 5c58c1a7d84bea3cda87cf780070678ebc0ba668856693f30c459580b4398613
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 10716 bytes
SHA-256: 20ea67b7cc1d979a6f775644f415b799208b1fa37789f220481a652f095636ce

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