Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e3c98d41ab3e1a…

MALICIOUS

PDF

95.0 KB Created: 2021-09-05 15:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9489fd70d216cff67184c48e1684e363 SHA-1: f7e56c2fd42d328d832a4db037be68aa43a835d6 SHA-256: b4e3c98d41ab3e1acac9155576b13f49f9004ac15c5d732938c47b676ab01be3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm, likely intended to direct users to malicious content or for SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://evola.it/userfiles/files/mixixirobelixuxujuso.pdf In PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/dc5f5b52ff7f867f1670abe6b1798074/fubuwabimativof.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/tefidebiwovezu.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9cf681b21---33442522980.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/vef00hmo305btn1c287t9pleph/pusudugaximugalok.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/dexibopegazidepuwusunefob.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117e6899d536---26041945242.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b25bbe22---fuvibeligab.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/xadepexisatosa.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080066714aea---fisezufajovijonakezuxapi.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ee71b24d81f---dalixidixudixuxomanivopo.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/zafewekelujukesowowig.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/0d4927e768ee7575a6bfad20aba7b631/74788466916.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tkvpaluiu3i7i9j28uj1j2ck5n/zosaguna.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/30959709095.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///taxebexigalamefobovoloro.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/97167785733.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d6164cc8---sefuvuxudu.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/84254453306.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d69965caebe---3596646788.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/875d053d217cd59c13c1860d1b03309a/71091666987.pdfIn PDF document text
    • https://kede.org/userfiles/file/56232319525.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/31244091142.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/fbd098447de39e6803e6849518e04de6/6954692998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=html+table+tag+tutorial+pdfPDF 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_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 15664 bytes
SHA-256: d2809be13b1d4a8ee23dcf51c933f3f63a5a3895b28ec7e6671d57775af661ca
font_02_sfnt_off00013f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1D 18444 bytes
SHA-256: 8df833af103d2739c141aa37ec133c38bee7aa8fd4ccb5b225e71a872bf5978d

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