Malicious PDF — malware analysis report

Static analysis result for SHA-256 704d9d8e5aadf93e…

MALICIOUS

PDF

74.5 KB Created: 2021-09-05 09:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4150babb94a0e4d96dd7fce8b6bba724 SHA-1: d4492609e362743a8e0e85aa7d29d486d13340cf SHA-256: 704d9d8e5aadf93e1faf49e7f85cb75d1aa420099ca5d9b5301a5f45dcae09b9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits PDF vulnerabilities. The document functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised or disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c600e0d8e---wukutusipuwafate.pdf In PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/86673710556.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/bosanexasisakiwupefesuzeg.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/5uu7h1fjcanm5ccndoihbad135/92458674891.pdfIn PDF document text
    • http://recrute.fr/files/files/wigezebu.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/6660029418.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/jegapodumopimosifol.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160709411d8286---20607842678.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/vodonavap.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210708050834084207b36p5g.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160987a3ee73f9---fikexo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160790db33db20---jimofavumadotomod.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/pupokowitoboter.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/85297711863.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607d655f49255---xirukegevexigizatesebudol.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/2974160256.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/wuzujenapi.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/gmodicbdurhi23omqaf3ks7jbv/94960915720.pdfIn PDF document text
    • http://maxbrio.kr/files/files/xixoxevowu.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/zesopura.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/g8r74pcgm5sa9unmgefuvdd977/59856023070.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2d1f50acf---vodoxavisadofizu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcbb6958ba---goroso.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94d9a2172---kovaxev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=magnesium+rich+foods+chart+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_off0000c005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC005 11112 bytes
SHA-256: 523c857456d8b441b52a62dc08317840da62bbebd5a484d49a3f1c70e62cd592
font_01_sfnt_off0000d991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 16644 bytes
SHA-256: e54af4c01f6061dafc65bc7b35bb4a5ac5e824ce4b629e46cbf2ff56547611f7
font_02_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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