Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e80ea042bf36d1d…

MALICIOUS

PDF

89.3 KB Created: 2021-09-11 20:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6fe8551e9094c85bc5fee4960d078742 SHA-1: b6465c7e700dd2488900bf3cd6ca873fac103c6d SHA-256: 5e80ea042bf36d1d1bc1c8d8a68980c52109d84a565c3aeddd2c5c1d144059ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the PDF functions as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution lure.

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://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a7be91d24b8d0aa26875afb3fbfa60d7/gebosaluki.pdf In PDF document text
    • http://chapelguild.com/images/usr/88174166184.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/17371479447.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/11268867242.pdfIn PDF document text
    • http://hkacca.com/userfiles/91067189431.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/pulifadetamidaluvezukixa.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/23622221697.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/sevodewojeluxu.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/79796456110.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350e151ddb4---80791186156.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/liweneni.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/77967567530.pdfIn PDF document text
    • http://akademibt.com/resimler/files/58702085463.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/nagiwoz.pdfIn PDF document text
    • http://unsersohn.com/images/file/xovazafilegurebu.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/38503697439.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/63268541310.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/mesoseletuwixexi.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/95948988499.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210903055427.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/76096903209.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/tuzit.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161315b6572557---786479277.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/dozixalidixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sadak+2+full+movie+watch+onlinePDF 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_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 11012 bytes
SHA-256: ed3c3b1334b9748bc58dc1b5589e7acfbadc8249edd85ccdad2547caac3d42c1
font_02_sfnt_off00012a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A55 17596 bytes
SHA-256: 4cb10dd4a14f6f56d570feb4b19df856134792acdfe923773d24d8f496ebcbeb