Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb22d0efd8cfb086…

MALICIOUS

PDF

70.1 KB Created: 2021-09-13 17:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 630aaabb22b38946570bbdf2551158a9 SHA-1: 01a7cd2eb8c5f6a101af3e4ef796d8f1ea22a499 SHA-256: bb22d0efd8cfb0869a22d19da90191ae47909dfc054f63c7bee998d57cb104e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm or phishing infrastructure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or distribute malicious links across many domains. No scripts were extracted, but the presence of external URIs and the phishing heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=mcpe+minecraft+pc PDF link annotation
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0be2c5d95805d28563bfa46a5fc7e15e/24583978257.pdfIn PDF document text
    • https://rippa.pt/files/file/mivuzaderorug.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/ruzunopid.pdfIn PDF document text
    • http://rts-3.ru/upload/files/kesudijotipe.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/pikatavusamab.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/nekimuvuxipaxuxug.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/74823204172.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/fuxenivewuz.pdfIn PDF document text
    • https://unitjaya.com/contents/files/pukozanelipixalilovigeso.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/55094581557.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/kexube.pdfIn PDF document text
    • https://2acontractor.it/images/file/zanodiv.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/rovefopojepebiv.pdfIn PDF document text
    • http://temple.mo/userfiles/file/75691020510.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210904_BF668398F58A3326.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/88524877058.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/33683754425.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/pimigugojofipufu.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/rapifarafetutolokafewugi.pdfIn PDF document text
    • https://mfdesign.hu/files/file/gosujeg.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/94eead9a962e2ecd96e689d80b26b269/verixupob.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/wejogivixexa.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/pifulowi.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/nivokexezuzaborimifuxumox.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_off0000b436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB436 15652 bytes
SHA-256: c5a8cd63219b00a33e560677670eb2c65f24c92a0f4d73028612bf6222e01416
font_01_sfnt_off0000dc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 10300 bytes
SHA-256: 878b2ef421e6a219a123d618f787968ff41b133003178daa9b626c9da194b46c
font_02_sfnt_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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