Malicious PDF — malware analysis report

Static analysis result for SHA-256 05959a618c78bdee…

MALICIOUS

PDF

75.4 KB Created: 2021-09-02 17:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43011646b28eb21e372e5ddec1c449ca SHA-1: 61f8ab017ca1637f20b0f1ae7e6c446e70bb7fc7 SHA-256: 05959a618c78bdee349cf9d6a259a8659430ef607b462641e47f4595a9f6410a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the PDF acts as a link farm, pointing to numerous URLs, some hosted on compromised WordPress sites. While no scripts were explicitly extracted, the nature of the URLs and the phishing detection suggest an intent to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4c6785c6e318977453a50ceb8abb66e7/31323221563.pdf
    • http://ambulanceservice.pl/userfiles/file/wasugatopunigizetofizi.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf13421c5a---lavukisuborovikelapi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/18db1e350f8901cc8533163f6221b06a/puledudabodovizazudonevop.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca121c18f---fepurug.pdf
    • http://3qbuy.com/CKEdit/upload/files/19424771454.pdf
    • http://hiroi-es.info/yamituki-n/uploads/files/tunaluravozukebalowajarop.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2d47db8b1---71896367726.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ca4c294c7f7a7576386554dfc588e698/19525170632.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f82533a2d9b---joxulukivi.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609777bbacc81---borugenude.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b782fd28296---80210105925.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/16989021270.pdf
    • http://capesociety.ca/uploads/files/kuroferisarepiz.pdf
    • http://betonkeritesek.eu/Content/files/1743726800.pdf
    • http://espicycooking.com/files/file///56508002498.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/gusunokazuw.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22d8205b17---8232387646.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f1f5283d29ad7bdebe8a8edf9f0573c4/jebokafinosasadabelirife.pdf
    • http://csc-020.com/userfiles/file/20210610131221_b717lx.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/921d050f3694aac2e814da3e35803c74/63102918390.pdf
    • http://jarosi.hu/files/file/busibanunebosejo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=employment+law+2018+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c26b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC26B 16792 bytes
font_01_sfnt_off0000da7d.bin
111af030e89be772aafedafed5a88f3197b3bdff1c7416443a95563939e717f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 17056 bytes
font_02_sfnt_off0001069a.bin
7609ef329e7cc4e6118bd0bad1161900915649b073d5b34b448f5fbab710375f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 10984 bytes