Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e29c2ed9340986…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 01:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f5d9fdff11a8521a85cd8e59efd9e3ee SHA-1: b3953a2d50316c94b81e0ea34474e45bcebf3e73 SHA-256: 49e29c2ed93409867d32759630fee4cb6f1f8a693d07c0f581c0014d7c9151d4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external URIs and a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=campus+gate+tcs+aptitude+questions+and+answers+pdf PDF link annotation
    • https://nulifeus.com/~nulife/userfiles/file/95477275905.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a2b04b0db31d69ea5673d1f45a7df40d/24739571936.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/30878763323.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8e2f4821d---54375688332.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/pepebenibugufolapizuzu.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/56745869310.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/jolawuzasoputamegonal.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/tibukuko.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/929cf7c5a8adfd44d4bcbf848b1e0f49/37875995048.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/wexuwowawikizix.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ff1s2gcjhnehomhr7hjfjiakmp/kokoreduxikujupejokazoj.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/19141869445.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770201e3f30---25823733064.pdfIn PDF document text
    • http://alltechsro.cz/files/9959215005.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/98863831402.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/653fcb76fa0772f057a49b3e55a5ec57/newowodupameforaburadoja.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/wawusukemumu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e507a38a9d2---71307449593.pdfIn PDF document text
    • https://kawanmto.info/contents//files/sisekezumomalefipe.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef47b4731a---febisevisa.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/33464098231.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/66704347043.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/rilefotufanekusilu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f55c4d54---26803588872.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/tcop937rt60jh51qg3re3ujv4e/11773242454.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/donuruluzozoragetuji.pdfIn PDF document text
    • 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_off0000d69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69A 17496 bytes
SHA-256: b422cb8811b4725ffb443a91d4f9163e3620eecd1565e1c37bab75c92d52acd2
font_01_sfnt_off00010417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 11280 bytes
SHA-256: c7e58ccb257508b101eef861507a2b3ebbf0317ae31a603f389d4507a464eef8
font_02_sfnt_off00011e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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