Malicious PDF — malware analysis report

Static analysis result for SHA-256 730fe95b742eb459…

MALICIOUS

PDF

80.9 KB Created: 2021-09-07 22:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05ec1c92e96b1d68a2673e0668bdcca5 SHA-1: e0b6c26aa3c1d0773ecd65439872e66860e6c90a SHA-256: 730fe95b742eb45961a090ce16c4a64e63d2dbe8afcf82ba68993dae4d3468bf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve to distribute further malicious content or redirect users to phishing sites, leveraging compromised legitimate domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://peaceinsrilanka.lk/userfiles/file/31669195143.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/6votd8r0a1sh2giogjqhnuc9mo/tibikobin.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/391d04924a00915b049ca4e35c6f2ada/43336599384.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/70583555030.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607804acb904e---lawepinenimofokujulaleg.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/58256456ec4727a4ce7fd9ed6e6eb8ee/48028485908.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/pemipiripevuxala.pdfIn PDF document text
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/70150214184.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ef7c4ea8874f04361f27f27b1773d6ea/sibafoxesuzenedijovox.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/40983980709.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/39e97de4ac02f2062057f5a137d81c1b/veroguruvitoxekajutadudon.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/xiwirepavipejibikubixa.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108314c80ecd---28578123841.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072233db525c---mozolizafejesisetikibu.pdfIn PDF document text
    • http://hanbangrd.com/userfiles/file/20210725004628_1428237183.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/95093670617.pdfIn PDF document text
    • https://samowar.ch/upload/file/20502707860.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/janonuxuxexizumexiviri.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/kukakel.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/gaxixubitejufa.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/zesekosaxojisusi.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/lixaxujajubil.pdfIn PDF document text
    • https://diphong.com/uploads/fezirope.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/79166729868.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/48339800934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=goat+farming+plan+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_off0000d74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 10580 bytes
SHA-256: 78cedd356a9535c7667aca3f80e2125bfb7ab199b1013f7baa4dd3e044de1ecb
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 18348 bytes
SHA-256: c0c251e0a269a2ed0910f8201c597ec213395dbc8640951e29b65456b24d89d7
font_02_sfnt_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1