Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4966434bcceebda…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 02:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: fd50ca08ef9e524fac322c73511b92bc SHA-1: b0261e2efd4f750927f0b55c93ebb5264932f23a SHA-256: b4966434bcceebdacc982b80929b9872fcfe2c69b30d675e680a5df7ff88eb8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious intent of downloading or redirecting to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://roycraft.ca/userfiles/file/beluxuxosumel.pdf In PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ef24fe922d1f292b17831f13d60c6006/zotuvegasariwudodub.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/62714325260.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/kobuvigosoj.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/xitajoba.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/tupipobimas.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f14253163---97281992613.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/vubiri.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/38546266665.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/71749308321.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/gaxiviloru.pdfIn PDF document text
    • https://yuss.it/file/pupokapozilugunademuj.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7mvv8g2b704k1fsmdl9h3ubbve/33774657416.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ea15b910b---7492233482.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5t7c3nok18q020ma90q8fusbqh/lagulesupakanevamukaludoz.pdfIn PDF document text
    • https://etadelloro.it/images/file/44586304636.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/ripunamuwol.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/liribagezozepesare.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/rajovivegom.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3416efdaa92332e87d138ca8fc520480/zebepizezovakukelusanuz.pdfIn PDF document text
    • https://alpinashop.bg/files/bibodilegipemexaruxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=six-minute+solutions+for+civil+pe+exam+transportation+problems+pdfPDF 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_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 11300 bytes
SHA-256: 64429a8d263c9439dbe461fdc5ce801efeeb85a3f4c5eb94ecbdc8f68922a3aa
font_02_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 18592 bytes
SHA-256: 36918a3f54c778556a240ad1090c91abe76ed2962878cfb7d5bad8b18c895c48

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