Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ed7fb120860b06…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 15:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e58df3308e1ef59c1f54be74abdff25f SHA-1: badbbbfeadff8f620dde8c9812d3bd39a1d9b622 SHA-256: d5ed7fb120860b062e792d6512a5d3187dc77ac85594c2ae825b186ea4c72acf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on potentially disposable hosting, suggesting an attempt to manipulate search engine rankings or redirect users to malicious content. The presence of embedded JavaScript, while not fully analyzed due to obfuscation, further supports a malicious intent, likely to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://eghamatsafar.ir/basefile/eghamatsafar/files/xamowuwox.pdf In PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161302d52888d3---pexivesumezimedawu.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/8908960301.pdfIn PDF document text
    • https://proxus.nl/file/67858461520.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/bezegapuzevuralumew.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/54561393492.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/mevovomivefuvimejuli.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/74103755397.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/02cb36ee3c4549db7f4beb11c99b524d/bevajorawasubuxozuvejepu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143508948161---fisupikaruvajoxuravajoz.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/31396923181.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16c85deff---xewatajifixepap.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/97085680744.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/45947949665.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/nofutadobupagezadal.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/wilakibamunavelunoxo.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/36068329292.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161428262f2cc3---nuxigemufe.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/fefizasuvunasesemugajoma.pdfIn PDF document text
    • http://kd-council.com/upfile/files/28676301336.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/sesakatosenukenevirarebo.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/96412470310.pdfIn PDF document text
    • http://119pump.net/d/files/foxuveko.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/rerofujodapobuwogilup.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/ruxer.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/medewutedugimategoxov.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139459eac887---polipafedusozumujibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=modern+organic+chemistry+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_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 11128 bytes
SHA-256: 74d99495d2ce9f8c1e7e214b22331853b719ecd3bf8817ee0030acfbed0d2e76
font_01_sfnt_off0000f8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C2 18260 bytes
SHA-256: 959cd32f20eee17b5f1588794d6ada119c58b688929a1a0d4dda61a4cd96c4c0
font_02_sfnt_off00012855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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