Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4a14a1e775ce68…

MALICIOUS

PDF

96.6 KB Created: 2021-07-19 00:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ceebc928e6757cdeab8be66770b7b2d9 SHA-1: 3f0fc06200d5586b6a303dca3df11d15ef19111f SHA-256: ba4a14a1e775ce6835c8d337ba994fd53ab409e2d67c7d7a9fa885b4d6e3e66a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a3712f52c---musewikisidarij.pdf In PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e25f2fc09---74460979916.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gbjq3p91ccf4p24rfkstanrhc8/loguzisizadurox.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/57332cfagup6jao37ldl2nn6k4/24784911034.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/fawaxi.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/bgjc9rr7he7dsfgg6kvgj4c5tl/taxofewogumaxevagurixo.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ddca42aecdaa6111fdec89e04195c27d/84069746941.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/sekubofigipumevad.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087f07ee90d3---15359460535.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/gikazazanukilapajanazok.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/bamabexoxefudare.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/vositinirivabupamete.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/zulovegoxeriduzi.pdfIn PDF document text
    • http://marymo.ru/uploads/files/wupumugamaromifev.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/sivodur.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/59801971521.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f81e76f557---marum.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/gajejo.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ec5e6a6a1a2afbd8401043dfd9cd0a02/39204988909.pdfIn PDF document text
    • https://prastosten.se/anvandarbilder/95/files/xorulababenene.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce1ded851---54966679502.pdfIn PDF document text
    • https://usdcp.jp/user_data/userfiles/files/10081341916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=icarly+one+direction+episode+freePDF 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_off000117e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 10676 bytes
SHA-256: b21d44996b29bc859a9a7e42afac9bbbec28745c9fbcb52f9d309bf83626de67
font_02_sfnt_off00014893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14893 17012 bytes
SHA-256: 68f54ac297f32f549b3f825341a3af7bf2c37f1a841af81ed4775415c5b10d84

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