Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3162bc59ff6425…

MALICIOUS

PDF

81.8 KB Created: 2021-08-17 05:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ae0895952b113bfc9ce89b8201ac39b1 SHA-1: a1c6ea61188f226455af7487230f29117697b71f SHA-256: 5e3162bc59ff642548310fcd4e402931a5073eb3a4bdf2291d8bc5a6c817c8a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, pointing to numerous external URLs hosted on potentially compromised or disposable domains. These links are likely intended to redirect users to malicious sites or download further payloads.

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 https://inwebjor.ru/uplcv?utm_term=personal+fitness+merit+badge+packet+answers PDF link annotation
    • http://dongamold.com/fckeditor/upload_files/file/jafutiviwexolivot.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/wotakevutemorux.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/18429514693.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/44705660523.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/3154511021.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160727877b452e---72946727751.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4c189febdcff5d6703cbd4bb2b3072d0/51607856816.pdfIn PDF document text
    • http://sartor.ru/upload/files/36090128813.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8490dd61be---vobijalerejudofixixali.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/zixinove.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d32b46c422b---zilepudevaviv.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/80282291453.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab00227623---36928143384.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/ratukejarajelepenow.pdfIn PDF document text
    • https://businesslife.com/content/files/60678503235.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/nepemiduxusap.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/20215620042.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/672950afb1b9e9fae06694a584f443b2/82256111934.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59127bcfc---68181865838.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/71150786824.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/zoluwugonifewuv.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d316af666b4f13ebc25a571270fff057/felino.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/tgj6qko9rjnnrkphr8pdptv204/79000400114.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d35267e005b---ponesutulejowabixinodox.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/b4d0c9d8e7346e2d7f642493b571ed84/5806038030.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_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 16144 bytes
SHA-256: ec45b8ea9a3872fe91001ca283d30f28d63450fd9c9c0af7c986dc54b5519bfd
font_01_sfnt_off00010716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10716 11280 bytes
SHA-256: a3c0960b1965d37514779331d803d7a1bf34fa51d179e463e03ef2eed040724d
font_02_sfnt_off00012139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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