Malicious PDF — malware analysis report

Static analysis result for SHA-256 382163f883f4a66f…

MALICIOUS

PDF

99.1 KB Created: 2021-09-04 20:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 189683551fb9f859f7531858f977e147 SHA-1: 7106d1629b1a67656ee215dc70ac60006dccf011 SHA-256: 382163f883f4a66f03dff0698525b208071da319e2708d1c1e911ef1033a02b7
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of multiple PDF link farm heuristics further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3b8036a3d---sozogetimozizinizo.pdf In PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/95618472692.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/54436444466.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/4fu2mibhf4ean0h0rtaqpc9d2d/89549459043.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/45546895557.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085ef2b1125f---82621290277.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/kemex.pdfIn PDF document text
    • http://rld-carbon.ru/file/rodebulojakasaxa.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/57137646491.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b6ae8e887---49535329546.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/74286333303.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/89113947751.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/145120515.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/puxozeron.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/dudezesisomexinim.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/jedis.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/53148704412.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/68557889876.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/lorisivupotezajer.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/39981662453.pdfIn PDF document text
    • http://sciattella.net/images/file/waguzoguzup.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091be300a5b3---ginun.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1624198063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wizard+of+oz+full+score+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_off00011c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1A 10564 bytes
SHA-256: 8e52c12109f3cb960745e8df4e2c0967f171ae1a9bf7def3bbd52aebb441f936
font_01_sfnt_off0001345a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345A 19400 bytes
SHA-256: 8cb33dca2c879f7fd663bce97b251bd7986308828f811c10d074a96d49e26e1a
font_02_sfnt_off00016655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1