Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eab233e2f81fa9e…

MALICIOUS

PDF

95.0 KB Created: 2021-06-29 23:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7a81e7c107bfa3c6419a6acf849f165 SHA-1: 99526cf0daa47a322dd3d2633e121895ede7114e SHA-256: 1eab233e2f81fa9e08b1762e12d1a827ca5189e9a668302d55f1d195f405599e
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it's part of a link farm designed to distribute malware. The presence of a security bypass instruction further supports its malicious nature, as it attempts to disable security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://habibitours.org/ckfinder/userfiles/files/56301567836.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/kuruzelekonibuvarupekuta.pdf
    • http://heyibnb.com/CKEdit/upload/files/telotazawele.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/885ivgrqth0bc5g6amc1bu8kht/niwazovafokitopaki.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608967242c653---kinave.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787793975d4---4413355091.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7bba024df49b4fc7fd3b29d74881e03a/vejalozafepozelurewizub.pdf
    • http://busankid.com/webfiles/board/file///bumeganad.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c8dfecee0---nadiwunabotud.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a34e1e2fc5b---pegalawidak.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160db3337e26bc---20761663299.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b56f27c65---55465972330.pdf
    • http://myjobcareer.net/userfiles/file/2021061915465073499.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915eded6d48---68837511393.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c01960d28fc---gipugepuwejifevokijobaxin.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/5adebebd795b957ad401080f035c3763/85273609027.pdf
    • https://dangeloremodeling.com/nbloom/fckuploads/file/28942820514.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94fa78eeb---6237564814.pdf
    • https://ikima.fr/uploads/file/89660411239.pdf
    • http://netflor.pl/upload/File/pevufitobexesidodore.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823972e3447---kikudekuxagopejarame.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/910204363bf55a7fe85b1efd284a3cb6/lomudiwobazuma.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b61517cf1a7---72530101909.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/f315d0c6f366f6f6821fde729e4fea0f/jegivugon.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/2b65f029dccaef11f136b5a1f0c6ec5c/2515710282.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=download+autocad+2020+full+version+with+crack
    • 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_off00010c06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C06 16792 bytes
font_01_sfnt_off00012418.bin
daa80438523b8d26f24bbe097d841fc79d79002512ae6eefa77168afb3054bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 17708 bytes
font_02_sfnt_off000152a6.bin
33cb6ebcf54950cba7d6726f9ddeb4714f0307b3e1ef71653d4bd7471327b520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152A6 11160 bytes

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