Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a4f50973f2ab63…

MALICIOUS

PDF

82.5 KB Created: 2021-07-09 13:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 786f566bfc2a059459f25d2d61c76dee SHA-1: d99f914df6b350e999bb428bcb40a1df4d136313 SHA-256: f0a4f50973f2ab63e8a551f2da0b4a16ab4b2f226e1e26c383f47d7409c21cba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content or phishing for credentials. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users through deceptive links. The ClamAV detection as Pdf.Phishing.Trojan indicates a phishing or trojan payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6136

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 http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607404d0ac384---43933057724.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/dc06009c124d9ca75e0bdfe0ca7df580/46536749128.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/1p94uhe357b0qndb0hj6ssdb81/tosusotowolixu.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cab37395007---45425017816.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7fefec35f---64054576730.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1e0a4b0cb9999fa1d3f4aaf546ca2f36/zazax.pdf
    • https://a2designbg.com/userfiles/file/busidatabitezigewabiz.pdf
    • https://mangmalungtea.com/userfiles/file/85415213874.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4c38668f---2208173100.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8d75cc9b5---rulanesesepakose.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b19d376ec584cf8eaaeac22e6394c0a3/73030219753.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/214592294a02411762199be66d85545f/jivutupezumebe.pdf
    • http://pechati-piter.ru/userfiles/file/zoguviwebijetogenowu.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/55ad6f7fcdb93b254695674c68ec37f5/luwowigasadozurizewam.pdf
    • https://whitesal.com/data/images/file/1145_20210517044919.pdf
    • https://panificiopasticceriabattaglia.it/file/watubetazasekijoxo.pdf
    • https://xlspandoek.nl/userfiles/file/82545923954.pdf
    • http://strandedtattoo.net/file/suvisapivopebezidefemus.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/vk1f2r7gtcbo08bgg3mnke6rni/vixodajevofuno.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/t39vru60hmubpnhpvgiqpo8ou7/kitupipasaz.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/c533636a4287fd3152c7c2c4beb47039/vusomoridujalafub.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7b4b9b181a3ae24ed300009480f44ea7/97182632982.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8926814bacedceccc079f57d8803d9f8/22003699716.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d309716ba4759a863f638d876c9225d5/98363324080.pdf
    • http://sugarfree-gelato.com/upload/file/31657794111.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dometic+rm2852+service+manual
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001129b.bin
a9bc08adf17a78eddd05f1929f256e5c3f7982008484e03af352b611f82bd963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 17452 bytes

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