Malicious PDF — malware analysis report

Static analysis result for SHA-256 5692d21a26849e40…

MALICIOUS

PDF

98.9 KB Created: 2021-08-07 10:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 92b019d112e068db3019dc1efa3c62ff SHA-1: 72735566d70f252a24e7ba0099a2061f0d99856b SHA-256: 5692d21a26849e40afe536ec10d589347906b0364c9a3baeb7cf25ed81546e83
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 phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://cnhhgj.com/upfiles/userfiles/file/japemajukutibapagatimifer.pdf In PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/76829692697.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e93e3a46049---56648533582.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aca27760f31---8558764070.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f42940d7797---fejuxunusatikugojugakeso.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/kavewifaxoxasodagin.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b8ff509a1---86954763956.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/53430220644.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/97873782414.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/98595436281.pdfIn PDF document text
    • http://santeh.md/img/files/575931294.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/nemedu.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/tafarevilusutogijetoteluv.pdfIn PDF document text
    • https://conberraquera.com/aym_image/files/sipobetosavofokukam.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/r922l26g1lpes2k2ru51vtgder/kajovigomonasi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/t5fbpqe61ilsj2bpp3o534op9r/76311784677.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4dbc55514---wezonuro.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/pitibokusefawegagulego.pdfIn PDF document text
    • http://jonme.net/ckupload/files/65255692080.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/6vclvn89v3jv46kc1kffb4jni5/71384080845.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/63237900199.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609420b2858bc---dewoparonepomabebogovu.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/bb62aeda2358754b776a532461fbf1b5/dedavuselowonusa.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/fugasixarasopaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=nonton+fast+and+furious+8+subtitle+indonesia+lk21PDF 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_off00011cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCA 17828 bytes
SHA-256: fd6847e416f6c059676d470b4b8f5e8c2b098a250ff249fe04e6855e7c6f7e52
font_01_sfnt_off00014b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B27 11036 bytes
SHA-256: 8d3b69cf73567ef2a343b409f068a9eaf59d977af2947923544df7826465764b
font_02_sfnt_off0001650f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1650F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1