Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce7366cc0aa3691…

MALICIOUS

PDF

97.1 KB Created: 2021-07-04 00:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f9fe59a6a5c6649494e9e946bcb1a4c SHA-1: 0ae1df07f5514b3d8d457de1a1cd4010f6844169 SHA-256: 3ce7366cc0aa3691cbac20fc467d7227373788a2731461a58dbda6a07ce6c1d8
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's primary purpose is to trick the user into installing malicious browser extensions or updates. While no scripts were directly extracted, the PDF structure and embedded URLs point to a phishing campaign that likely leverages compromised websites for hosting malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e48dc4d34---puxuwujowonopabitufosuvul.pdf In PDF document text
    • http://altinay-law.com/images/file/beviro.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/981ad00bdb84b11aff0ab717189ac3b0/44629134342.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef471b266e---gupas.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a21394a5---97130623508.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ab9fd3c11---2952919230.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/76323246528.pdfIn PDF document text
    • http://abnicum.com/files/file/dexijinowusudenoroxeb.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/d0af8285c62d4ba83374a022cd3774d0/88688251866.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/8btvojntb9ug078o9j88sj8lk6/51497185585.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fibemuzuxiwesovusonukoxo.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090aac043454---risejagadege.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86280dfc6c---karutasejezurisewelof.pdfIn PDF document text
    • http://tcmoving4cure.com/clients/a/a2/a295acc0500fd37d831de80ba00a7552/File/dunirobosovij.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/43993220239.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ccc97bbc2dc1fe1b4ee7775d3b0aa358/joguvu.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210621194957_52261696.pdfIn PDF document text
    • http://aven.su/userfiles/file/zudajokavigupeloketewiluz.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f320bdf1---85185275684.pdfIn PDF document text
    • http://htwy.com/upload/file/56529203812.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/tewagalobu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080271e9fc24---pazupesojulumodazomaku.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/savilufitagovan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=left+minded+peoplePDF 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_off00011a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 18144 bytes
SHA-256: a88cd0d3018c0ddb8e88a503e7ae6cb13041d09d9af148f628617c1553f32df5
font_01_sfnt_off000148e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000160fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FE 10184 bytes
SHA-256: 23c826559e1b77a2003ae8dc4457273c9169b56e96c6a6ccc41269cddb632e3b

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