Malicious PDF — malware analysis report

Static analysis result for SHA-256 60273c64492d3987…

MALICIOUS

PDF

87.6 KB Created: 2021-09-12 07:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3776e25bbd492e1602b56145987a46eb SHA-1: 2682dab71b0afd56ac7bc17ab5c2efc31bd8861b SHA-256: 60273c64492d39878931c10bedd5ee4cf0f6446fd1edbd9ea4997e5de761517d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and the ML classification strongly indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=instander+download+app PDF link annotation
    • http://neodermclinic.com/file_media/file_image/file/romitulepakutipiw.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/zirusujofevon.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/begejolojuv.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/10080740057.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/52302201842.pdfIn PDF document text
    • http://netart.hu/userfiles/file/92648979289.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/70505598711.pdfIn PDF document text
    • http://micruts.org/userfiles/file/kevakasomefegudexogotax.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/rawab.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/sixisuzebapufogoxisosika.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/26093369298.pdfIn PDF document text
    • http://hrudolf.com/userfiles/vifogupininozudaberubiko.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/29963719836.pdfIn PDF document text
    • http://dsraxys.com/uploads/torosopipetewedi.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/dinixemazuritedisuwuma.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f389669d42---difadinepusikuxomidirimug.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210901_230312.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/5vqrmc3vloa94c6jpudbm6j5d3/4847018462.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/76870771231.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/35388486470.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/52893017483.pdfIn PDF document text
    • http://mopron.ru/upload/files/83763212899.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/79548444788.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/rodugomos.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/jigarupikaduzofudululike.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_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 17844 bytes
SHA-256: 50fd26793b1937f8c38878d65179ebcb42afdc110dcff514af4bf9889334e0d5
font_01_sfnt_off000120f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13909 10332 bytes
SHA-256: 85033d30570e08107961f7e8abc0fbbaa8fc8ce0cb79dff2b95942aa6ab414d6

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