Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e4839e25b72706…

MALICIOUS

PDF

59.5 KB Created: 2021-10-03 22:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6e447123962f58b7772f7398206f2f8e SHA-1: ab1006a3fc5673709e34ecc3ca3d80a8f5e52646 SHA-256: 27e4839e25b72706d32b092406761b9a07f82f2e52d0256fae4ea0bd78d08f19
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6416

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=phytochemicals+in+coffee PDF link annotation
    • http://qdjshg.com/files/file/91354342964.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/rubodemirudakokategebanex.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/52832726950.pdfIn PDF document text
    • https://hoongnau.com/upload/files/75432910826.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/25186828406.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/zuzugaza.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/5959557091.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/jamowasimewokadufoxiw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd2f134dbb---galexajuranisozaxo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef3aeba96c---27732956291.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/dozemigen.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/95076369220.pdfIn PDF document text
    • http://fialki.su/wulataruj.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/59915160092.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/muvaxo.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/68520050583.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141399d1ab32---xiwebar.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/44619771046.pdfIn PDF document text
    • http://www.bash.cl/media/file/rikiwexemevalajidopafozax.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/53576402566.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/160821218171.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/17502961274.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/wepozobofutafulatej.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/99429392110.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210904155204.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/vowilonexenadizoxu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB323 16944 bytes
SHA-256: 7dbff7f2747e286c7bd82d9f094b778559ee4413e405fbc2df32fc2179059736

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