Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9f3a67775a0f16…

MALICIOUS

PDF

101.8 KB Created: 2021-07-24 14:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a6d72755b340ee455229bbcc8395586 SHA-1: 11ca22f9e08163ac17be7f918b7c101df167f9cd SHA-256: 5e9f3a67775a0f16b1378548d3a4013cf5f41fdb487ab8fec495d41f2bdce4ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple URLs, some hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://jf-orvalho.pt/userfiles/file/jesegu.pdf In PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160747df4bdaf2---jitubilip.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a9036b2fa8e---38534046201.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a84f704d0---27980798865.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/61987368004.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/ruluzuzareboranivolot.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/2621hsrojb392bbki3j0u6j1l7/24653227625.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/5337f3caba649de1b2d7a0399b53403c/41864901512.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/33730397990.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/83609454094.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/punofavupogekojuvaw.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/kezutimigusima.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8a537c82b6---14612208542.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc2ccb31bb---6074598346.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/34371175264.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/79535438744.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160805a0a0d4ab---28874087821.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/ferisinikunazab.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4226837c8---jurujanoge.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/fcf298d9d8774f93335ba4efaf51c40e/28950460872.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/juwetepewepudixetuge.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed8fcb90a8---gelilojavowuvof.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/waxudunux.pdfIn PDF document text
    • http://eths1967.org/clients/6/6b/6b000f7c2bca5b3a89f93fde6b54c5e6/File/nawixaxowuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=waiting+for+godot+act+1+and+2+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_off00012651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12651 10616 bytes
SHA-256: af8742ff292da63ecd091886f3d55060b5abec1dffe8392d51c3ca0cef75f894
font_01_sfnt_off00013e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E99 19428 bytes
SHA-256: a69a47f306a8f2d1820a31b327201ffadcdb5982782f925241a3c9df8871655c
font_02_sfnt_off00016f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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