Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5e6b487a65d80c…

MALICIOUS

PDF

78.2 KB Created: 2021-09-11 09:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e63a20afd9b12ea1ab3e5dd7a53554d4 SHA-1: 993bdaae2e6c331df7c41b8ae992d3667603de10 SHA-256: dd5e6b487a65d80cbaae81ba1830f27ba443de8c3cb5379f00376096cba3123b
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS upload directories. The presence of urgency language suggests a lure to entice users to click these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/74111432396.pdf In PDF document text
    • https://clubslotalmatriche.com/calcas/file/56459643202.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/4b88147724e08ab40147059f643f06d3/43358437802.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/juxixonikekixu.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/jikazalegesatudofibadakif.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/53343785894.pdfIn PDF document text
    • https://777mto.org/contents/files/zelizekunetaxupada.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/rurodujufifefo.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f127b747cf7e55fc174f0aff1264abc8/migafanerulekagobolisifa.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/wigekobitomimilimuwa.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/niluwasowesepenegoxoxuj.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4a9338af3---56272385001.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/duroboganekaf.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613400fbb0f2f---wuwodibi.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/xunofuxozujumefivobetono.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/50233880501.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/wofigoxomewewej.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/21974234996.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090422213673499.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2f10bf9a---jozudowidakufi.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/dezixiwazoginepojodifib.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/5939279985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=wrath+of+man+full+movie+watch+onlinePDF 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_off0000cbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE6 17856 bytes
SHA-256: e4a7da47ca0df1e06ce8807d042bc298b9e9fa588c4fbde33208c4edd1bbc86b
font_01_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 10680 bytes
SHA-256: 91211b84ccc807edb96330a70a9d400c3517ba5b3ccbe58d2115e2459d21b0bc

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