Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00485ad71e24c41…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 06:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5bf4cb1ecad70b7678e758c8e66ae64a SHA-1: 3e70a6d2fa6caebc051d13150e113a1c7cf2e0f9 SHA-256: b00485ad71e24c41397c94a5ba4386de29ea5b7ad14fb6dec0274df271e2f95c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the compromised CMS upload link firing further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://pistant.ru/uplcv?utm_term=front+military+press+machine PDF link annotation
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/dirafazoxelenidemixedoju.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c80c4c938171c8203b3304512e2268f5/fitofevikosepadona.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/86489394407.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/megezalati.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/254qt1sk4c7034idvjs5pgc2jr/reteludat.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/manud.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021061309264480554.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a84315b20c---zuwixu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a237243a0b7---gubuduvibakerujoje.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f84a7a24---dupijivularekig.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a2abd4af---22273272807.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210602063159277.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/2fd2dee00f63bcaf6f12b8aa866e30d9/sirofa.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/67710035366.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160841436a2b13---xiwaxelimajugegesam.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/bixederabil.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a020f18dec9---44308688252.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/dedefa.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/94828d62a223dc8a3bb466f5dc3002c4/2972518375.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa8d648c03---togupanemawusojera.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/72706551901.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be4d9b6e959---paxawanitu.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_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 10728 bytes
SHA-256: 9321001e020c1e3c08ae28150614548751d1cbd7cb81943757d2ffad7cf463d1
font_02_sfnt_off00012991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12991 17884 bytes
SHA-256: cfefafe5febad7a3d0cef123690fe43ef1135674be32d69be59283b431bd7387

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