Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb18f48ea675181…

MALICIOUS

PDF

124.5 KB Created: 2021-09-06 22:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 94b8375321f8e5ae55428e325f2d757c SHA-1: 42a5be3e35c5251fd4995bca858fff2f6f46d37e SHA-256: 9eb18f48ea67518142b058d3257ba215eaafc6e0792e4b09233a2c1803d92913
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://3colorjazz.com/fckeditor/userfiles/image/79471588192.pdf In PDF document text
    • https://fisheaglesafaris.net/pics/user/file/92378207820.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/53928276512.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/9gtfll4fgv8fn2s7lre0d293t3/saxezoregigumijibuxadizi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a682f40860---79513051637.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/2e323ac6943af2febec73e246b11e530/doraru.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/18156645196.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e12b8ddfba---58890918892.pdfIn PDF document text
    • http://www.heksan.com.pl/file/75125993797.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6828fbcfa02b6fac6b3619318199d115/31370520455.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/80517945527.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/92ee8dc14b7bcf8c9e67412a2df28896/lalose.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161205e9de08c6---91726773124.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d8631727---21552190707.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/pedanixa.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/nosagekijebapakabara.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/18724543024.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/79570515148.pdfIn PDF document text
    • http://delve-cr.com/uploads/80313488048.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b899a678c16---xaviwi.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/sf06223uvjo8t4hto2hc8st1h0/93375327461.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/46649380625.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/rigobenasonosawowez.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/65950779312.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/f1f6c6f63cfafadb3d69798b53f894cc/12883502193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=oryantalizm+pdf+indirPDF 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_off0001786f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1786F 24028 bytes
SHA-256: 1b6ff46ff29ff0be2fc9ed6f68c92eedb55b39ba04bca56155c9547386e0bfcd
font_01_sfnt_off0001b442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B442 10436 bytes
SHA-256: 3f37bde2d13c28ddf718e8c1f04877c8c9266431b0c84c483260433266f2634c
font_02_sfnt_off0001cbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1