Malicious PDF — malware analysis report

Static analysis result for SHA-256 1150af7aab12145e…

MALICIOUS

PDF

79.1 KB Created: 2021-09-09 01:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 910517675c9fcc4a7ed321ea420c6faa SHA-1: 3f5d3b6bd0c74f3bb07dcd33619fde39674e9c0c SHA-256: 1150af7aab12145ec7bf1ec2ff0be29060bb3d25615f9d04a551e45330521331
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting. These links likely serve as a lure to download further malicious content or phish for information.

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 http://tomaszskiba.com/userfiles/file/76308014801.pdf In PDF document text
    • http://tobn56.com/UpFiles/file/lalixenidekiwuvo.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/vijariterojiziv.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/pujadomakovirefesunemolu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130755816c69---zapofugoridebififado.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/vodepedofijazotuf.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/ninogejexerazux.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/mekunidol.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613176064cba9---dugubixozozos.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/95427377480.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/miwinuno.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16138b8f44d83c---sodirewifazibula.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c553c12e4---9556987795.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/16884587299.pdfIn PDF document text
    • http://thaide.org/userfiles/file/divepilagugilegobejev.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/pogegalotigigi.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/rovirus.pdfIn PDF document text
    • https://music-group-store.com/upload/files/33414327882.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/mudakifomulor.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/46167423230.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/99124285836.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210906194920551.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/96551479823.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/sosarirezipux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=super+mario+bros+4+apk+downloadPDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/jepale.pdfIn PDF document text
    • 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_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 11024 bytes
SHA-256: ead97a68550fffb1fcb1d3c43f0d1875eb14848daf8646151ecb8106c1041250
font_02_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 18352 bytes
SHA-256: 9e4a3e1226d6e6be9a305f0c224cd07173d39829969526d71986341414049b24

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