Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89809c71bb6701d…

MALICIOUS

PDF

85.2 KB Created: 2021-09-11 15:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4074af770f02b1c269ce1883caeb2782 SHA-1: 85b1b243e94170d76ce39d0fa78a79806397ff6e SHA-256: e89809c71bb6701d387304e1ecb9110e61f7b3289de3464d836bbc4193d02800
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://traslochimontalto.it/userfiles/files/xadawug.pdf In PDF document text
    • https://lmbri.com/WYSIWYGImage/file/zofidaguvisubibedugewit.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/85040690044.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/laxabafutafogigesumotulez.pdfIn PDF document text
    • https://funke.be/data/file/ridapapatililitifikax.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/53823659021.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/jatugowej.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/48822167843.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/vaxitud.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/jezadogawebegowemaxa.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/89345995736.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/21855704949.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/m1h3olfk97hv0o7s47t5j8cov9/53589142543.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/58423865695.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137801166157---patejakodilukiwejemas.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/9146253209.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/befomufujifubibazibizowuk.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/zosufotupipaf.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132d84f1d9cc---1829271686.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/95710334934.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137d991f31c1---migopitasegoba.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/jewuzalikamuxaj.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/24132152201.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/sitidugevi.pdfIn PDF document text
    • http://innotack.com/userfiles/files/66674948381.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/1660468886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=quantum+mechanics+greiner+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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 11060 bytes
SHA-256: 8e3c6217cb6c20810b5914f851fad0959cb5a687a5d5ff0b5ad1e44c95548e32
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 18908 bytes
SHA-256: d84ddfddf2fb3c71c687e7b9aa333a6d2fa63a45b382aa98cc6b3194ce1280f3
font_02_sfnt_off00012ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.