Malicious PDF — malware analysis report

Static analysis result for SHA-256 80734f69b8b5ec7a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-16 16:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5da5b26cb4a4fcf64eab869ae73ac480 SHA-1: c4ab3cd953b6dceed1eea29921727ccba76da024 SHA-256: 80734f69b8b5ec7a2842920cf16646ddffc927c9112caa87787b1ceb3b78b0c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a link farm on compromised CMS uploads and disposable hosting further supports this, aiming to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cascinamana.it/userfiles/file/60093416875.pdf In PDF document text
    • http://designbyjoseph.com/uploads/File/50777537929.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/jipukexufagitenarogis.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/sifonebupit.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/sesubavipejur.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/modofiwegexakag.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/gokibasisu.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ac1ce9934ac421dbae6e82c2402b71cc/65570706762.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/29911591665.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/4274238947.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/rapanojototutikozuwasajev.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/95066302507.pdfIn PDF document text
    • https://projetovm.com/uploads/files/31603506199.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/93149181998.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/duduxupi.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/58106100628.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/48707485312.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/kanakofomivupatogoz.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6c96185ee---34843267040.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/dinadasowuvid.pdfIn PDF document text
    • https://wrd13.com/force/file/92156920529.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/03d8d294908d2fa83f17d6b75c34bd69/17922148643.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/jarokamegolowagi.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/99054717963.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/xetakopawuzinijevisudus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=handbook+of+game+theory+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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 18132 bytes
SHA-256: 6222ae7174617ae8ccb3daafb25a16b344726f4101a2b89052dbf8b217e93dbf
font_01_sfnt_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 10976 bytes
SHA-256: ba9e1c5b9f021a41f17419c90a2e06dfec3acab2fc849db6398d4c7dd234500b
font_02_sfnt_off000129f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1