Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bc12c184c41e86…

MALICIOUS

PDF

76.0 KB Created: 2021-09-01 17:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f8f003db19941d9949e86fe31a12b6ea SHA-1: 32e7a06a0d2a672fd8e755923602a5739f02c596 SHA-256: c7bc12c184c41e868e81205ef791e70848c40f5d9a6ea7bc0fc11bbfebadbfeb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 https://coretry.ru/uplcv?utm_term=personal+mission+statement+examples+pdf PDF link annotation
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/puxomigojifevowoferaz.pdfIn PDF document text
    • http://didula.com/img/file/nelowodofevitowixajotake.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607856382b868---retiruwajuwebafonibagi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e40370dad38---nisitakowobutujevosopij.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/g91ntq5oha3hdoftj3smck82nq/40669298080.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a59152a4d8---rutobulivolafudal.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/cdff018df81ebe5a1f3b77fdeecad740/fudenapabakosojogupotexuz.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/ziviboleke.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/nusuziwolomusibururumaw.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/xutoloja.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/kojapufarumafoxuv.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/19834266996.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ce17d37003289f44396d6b05d16b973/nidifelukufiwikewepa.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0d5501b9226098ba84326c521f3939bc/33790162692.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4a4357a2fe8359ad98dbb81ec2d62472/653867635.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/96828327791.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909c31abc9c---zoxumazuxabawafipefikora.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/xeliwenusulagetug.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/wifozixanudimap.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/72148186366.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/87033665556.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/uh5ec88pd5bpjhnifegbgc611o/retowixijogetil.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/ziwafogutamuzepajow.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/1535014741.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c1q7a1ngvldo53sicbh8os3dg7/pimonekuvunojeburezezo.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/rivumijunegopibene.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e5de67df---vumofeditafip.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_off0000cab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 10760 bytes
SHA-256: 6bbe0a64604d7c918bc0973b7634667d1ae8e1b5dee6e2060a4a7e0d3941ad64
font_02_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 15484 bytes
SHA-256: 5636085017366ea586313b257a28ac50e1b078958cdea9057222c1616b36e57c

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