Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccd1ba64a9d1b1e…

MALICIOUS

PDF

92.5 KB Created: 2021-06-29 13:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42c95e5ddeeb0ff844210a0f3268feef SHA-1: 342f7ac63c0343ed298a9895605f23c4df46ae66 SHA-256: 2ccd1ba64a9d1b1e397e4b881156c0f46f7df3db9d48f8df9b5fd427a00d8071
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised WordPress sites, likely to host or distribute further malicious content. The presence of embedded URLs and the structure suggest an attempt to trick users into navigating to these compromised sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/54pvbocni25f65v79fm5s536q5/39016910941.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608affeb1116d---55526158828.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/8701dcf1ebd90cd116f7383fa3ff4e6d/lamazenes.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1dc88645fb---86977190170.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/7a1f4202ca4a81b79c8703a2a2624812/widufis.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a3073628ae4---nisifixenidadunororine.pdf
    • https://aduanaldelvalle.com/userfiles/file/sisamew.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe9bb9bb7f---98179981913.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5dea35e5d80c2b3da347e46d0f262061/kunubozijabubozomaberor.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/14381f6d70a495a742efdc240500d913/gitulejewivu.pdf
    • http://hasici-pristroje-eshop.cz/files/file/83615406062.pdf
    • http://africa-emergence2019.com/userfiles/file/kotafarelenikumafu.pdf
    • http://china-engine.net/ckfinder/userfiles/files/fubedogekus.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c30e7e71f---jodaxiposomewuwefudeto.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cjd0lrat62t2891jklntfn8df1/bisud.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0e074dfaa204ae9722854a6a66136a90/nugarita.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3db3e0c0---3099296286.pdf
    • http://brnc85.com/clients/878796/File/14192454241.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/upb4q1dt7cd1srgpra5msis8da/73435388487.pdf
    • http://phuocthuan.vn/images/pic/file/95777296622.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e75e6e4d51---vatufemelaloruxikekorogi.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071a445a8589---zeduvuwivivagisedivagaxed.pdf
    • http://dogoducthien.com/uploads/files/rimekaziwizigoj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+long+does+smoked+fish+stay+good
    • 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_off00010692.bin
598f65228c7acf9381f288d1c5e956708f51e0bff63094627f48d4fdf15f3b82
pdf-font-stream PDF embedded font (sfnt) at offset 0x10692 10984 bytes
font_01_sfnt_off00011fb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB9 16792 bytes
font_02_sfnt_off000137cb.bin
1c0590f6ddb9f9a177579e6605f0c0b4a23a41a3daef2c8acb19793e1b3e3867
pdf-font-stream PDF embedded font (sfnt) at offset 0x137CB 17260 bytes