Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93f14992f7990a5…

MALICIOUS

PDF

85.9 KB Created: 2021-07-05 03:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9468d0ecb0c3c5dba282a868e39e7f5d SHA-1: 1cf39a477b1723e6f46acfa324911b93663a6c1f SHA-256: f93f14992f7990a58821409edb7ad9d82d193917e6923b53959446e145ecf030
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The presence of 'utm_term=ms office 2013 crack download for windows 7' in one URL strongly indicates a phishing or scam attempt. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://aarogyamedico.com/userfiles/file/musudo.pdf In PDF document text
    • https://eberli-medical-supply.ch/upload/file/xelinurirovo.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/pemeladek.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb97725d5f---71451672420.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b23989173f---17313719019.pdfIn PDF document text
    • https://datawire.gr/files/files/98773645079.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/6122397099.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8422d70f75---49068886192.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/94444589803.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ae43feb18b27c5a0589f1e5e01a6d0de/putinexupedijilupaduvos.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ecf0fcf4f125c9b50b08af20a17cfdfe/filokekepoxifopuva.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/fujetemipomikagive.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957f0b5ac45---raxote.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/najumipe.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fb3885be6---59751203602.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1fc60b29---89618184042.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ce9a3f48b2b4cf613cdfc420b670910e/42640944170.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cfd612b97---59106505706.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b00dde7603---nelusak.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/46896459878.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/figifileg.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/mukififojuwaron.pdfIn PDF document text
    • http://expresskaliski.info/file/vomulexutomewadadavevilif.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/3accd8938f4073f815456c0a5b275f59/48143981159.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/sugupugimifarikukotono.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/n7fg0le8u138siasbnvfqpii21/70315292465.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ji9j3k49conoiuq8f7811dgef3/mizevudadulitufaxuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ms+office+2013+crack+download+for+windows+7PDF 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_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 16556 bytes
SHA-256: 461e7a7935816032fb70fa64c0174c04225118adeaced67bc9401b01066a6043
font_01_sfnt_off0001177f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177F 11056 bytes
SHA-256: d0d98ba8883bd5e10cbfe1cebbb16b5aed77dc98a5b51a441dd5f14f56c93060
font_02_sfnt_off000131a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1