Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24405411bc386ee…

MALICIOUS

PDF

70.9 KB Created: 2021-09-14 05:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5a2aba062d7dec5010b9126d7c8db59a SHA-1: 9a8c08f9c5d6fb804677037d30f74753a4ef458c SHA-256: d24405411bc386ee821880fff51d61636e59da230c32f73d132a927f135f0a20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, some hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' reinforces this assessment. Although no scripts were explicitly extracted, the nature of the links and the overall detection suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://salsainkonstanz.de/media/files/94977369437.pdf In PDF document text
    • https://myparrotfood.com/user_files/files/sisavuvapipefaku.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/kijezemolufufej.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161373ea8389b1---mutezitelipozava.pdfIn PDF document text
    • https://eurotig.ro/file/23461348049.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/tonufe.pdfIn PDF document text
    • http://sksound.com/userfiles/file/17554755666.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/68638567250.pdfIn PDF document text
    • https://porfic.com/fotos/file/bufekipuzibavejoso.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/2fgie761533gq2uffjem8p43ug/90758210248.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/taxudepamaravemolepabun.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/dinopotujosudoges.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85ee309a8---demekifonagoxikawokunekel.pdfIn PDF document text
    • http://njchemland.com/upload/files/doxujusuzolaxeposiv.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/18099842763.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e78fde3a0d---gosegevu.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/popoxakabeg.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/65028156622.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/wixinomum.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/61909924338.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/keguv.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/zogiwamosakebes.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/45605175832.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/16815579757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=fake+gps+new+versionPDF 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_off0000b557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB557 15908 bytes
SHA-256: 5ee68fd3f14c7131fbd1b653f1fd2bfc5438145f36e0cd6e1a898242f388c57d
font_01_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10504 bytes
SHA-256: 3297b8e30e9b98a8520ea702d4a1acc2be3525ba43999441de46fc086091196a
font_02_sfnt_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.