Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f47362202e525c5…

MALICIOUS

PDF

87.1 KB Created: 2021-08-17 09:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c21acedf2ef3a1d9a5509eae9b499a12 SHA-1: 2b4b3183ddac571f29f145893f9a06be0dbfd73d SHA-256: 5f47362202e525c52f8e22f985ad2832a5ff0334875b3523976e07e038d1883f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://fulepmark.hu/nyebu/fulepmark/userfiles/file/gegapezudironebedijilig.pdf In PDF document text
    • http://photou.cc//ckfinder/userfiles/files/napotamofekizifotuk.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/31fue70llcbntr85n7ha8pedjp/87442626567.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/mavedosotawa.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b801eee5502---32055915887.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0g140o0lv22af5i1bcoggrlsc/rozerozujalugi.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a358bfa2202---55948199974.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kekuzapoxanolekoninorewu.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kubexol.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d635289b6---laxima.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2da054d78197f6fa70b6c483778f20f3/25263343758.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/kelaxolovafusebaga.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608beb44d4062---jimorefudo.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e5f8ceb3075a278612f0aafbb4f588cb/dujubokavijobesiritutuz.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608579f55be2f---73120948203.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608138501dcbe---11730012949.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854163f0f8b---bimuki.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7737d12f5f---murogosinexuvurorenoj.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/d8867106754b5a1b8364058bf0ec1226/99446215488.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b183f2695d3fc2dfc9035421bbc1764a/76688870030.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/81622809256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+recover+pictures+after+factory+reset+androidPDF 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_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 10880 bytes
SHA-256: d4f17a3da91f4c5273ae51af9235ef40bc85abcb3a2adf35cecd033a93ea5e8f
font_01_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 17764 bytes
SHA-256: f1c82ccd59f8571ac480318b9ef3c3c7f1497e5ae7d321c667fabfbe2ea91abc

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