Malicious PDF — malware analysis report

Static analysis result for SHA-256 65caadb0e7793f64…

MALICIOUS

PDF

76.5 KB Created: 2021-08-28 01:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddf8598bcc3133d598ad8dd81ce05eff SHA-1: eccfeeaa26b7717accb3ca0429d1f1d507f32297 SHA-256: 65caadb0e7793f64163581d4a9d29d1d313772f30cfb2c923330e3b9357c0a63
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dae2a2abe---61419515570.pdf In PDF document text
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/zavitugivukibofosuz.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/vefifere.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087865e227d3---37783305772.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210823_BE182AADB297671A.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/47582909963.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/kinarumakoriwazale.pdfIn PDF document text
    • http://df-2.de/images/daten/file/nekuvunoborasulorona.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123854c0761b---30175135037.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c53f9c9ba---xudozikobe.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/28983430700.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/d391ccbb436d0b5233a7da014d7c8edc/30433557060.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5a28faja5ihkoa2b5au18v1471/38365278897.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/45440bc5eb6cb45222af36d39a3617f3/47248549040.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/15286019486.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/71084982051.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/d0bd1de48115048ff7301028c824d600/gifisejesusixene.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/33659138889.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/64177856911.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/nirofozu.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/bcac3a17bd238a3255aa4dd599d0ec29/42443589623.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210703051609_6fls46.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/73590911581.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607753f44915c---wexapumapabudowebuwujilud.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/refejelowujalipirogozem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+take+the+sensors+off+clothesPDF 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_off0000c7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B7 16760 bytes
SHA-256: ccff0e13b241af429e827571083647945618a78559ac2675492f6cc62940124b
font_01_sfnt_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 10512 bytes
SHA-256: 31492b29c598a2fff2e61c6caa807db281a54413eaf51142e6935d349ba5cc2a
font_02_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1