Malicious PDF — malware analysis report

Static analysis result for SHA-256 224bb004ba9a3f1a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-08 10:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0987ed6e2df66ca34567f5cf00b4bec SHA-1: 4c2de060ee23a8c6117913c5f970b0b721bc262a SHA-256: 224bb004ba9a3f1a4d997d7e858753ebd85f3c85116ac9bc76b5f932c721b4c4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous external URIs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://kme.pl/global/app/webroot/uploads/file/16293113360295.pdf
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/debapebepex.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2a8a970264fa53da13914b936b580dcd/vazoruzapodajizimunoboje.pdf
    • http://dungcumaymoc.com/Images_upload/files/95055972614.pdf
    • http://donationwebsites.com/clients/6/68/68901b9e08e997a22fc64c74502b39ca/File/nozukasexevi.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/6e5175d5a17e3b2cfc05fbbc08078592/14558080689.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105ba7b6e85b---67268856043.pdf
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/dubinisavosopudavufasid.pdf
    • http://eternaseguros.net/files/files/leximafa.pdf
    • http://bielwod.com/userfiles/file/bagezejizozipijetojes.pdf
    • http://ordineveterinarivenezia.eu/userfiles/files/32975072757.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610a25f91f9ae---36801872114.pdf
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/25325241749.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/tbli9oq4aluvl35jsc9tnq0bar/sekev.pdf
    • http://yuli-china.ru/d/files/gepido.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb403b0ffb3---wigumujekuzatalagajit.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca55418feb5---bewezivabaropiwulo.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b43342cd03---91879941362.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3724228aa9---goxokusatexisov.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873a2cdad69---56746084126.pdf
    • http://jacsonsfurniture.com/userfiles/file/biwupamufikufeketokorejoz.pdf
    • http://yaeram.com/userData/board/file/9279183918.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/79904825647.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609917030a78b---mopuf.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac196dcfae0---18080966796.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=induction+cooker+circuit+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 16792 bytes
font_01_sfnt_off0000f1b9.bin
b53d4449e465115c1724b462f5415f50969b6e5ced011d08a9a7ce27414d4500
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 10380 bytes
font_02_sfnt_off00010947.bin
10807be124476350458bce8429cccc011aea98709b89e0f8101010bd96223411
pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 17104 bytes