Malicious PDF — malware analysis report

Static analysis result for SHA-256 95330bda40850748…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 17:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9f65e9c88bd47cebd828b63eeb5bf3e7 SHA-1: f6670a3dea4443e9e3cb1b93e1e5576314249aa7 SHA-256: 95330bda4085074807e7d53236b8d39c97f3e5115bb214c1db939e449b0001b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=free+fire+lite+android PDF link annotation
    • http://maryalo.com/userData/board/file/28212848335.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/damepibimolesapow.pdfIn PDF document text
    • http://boki.hu/editor_up/dedap.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/15833344360.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fde668269c---83618458285.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/14786251668.pdfIn PDF document text
    • http://nincity.de/inline/file/54776739386.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/aa9455528b8546cfc138052fa3b47d9c/73772536577.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/retuj.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/42187104339.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/43528955169.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/14889386765.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/89606290300.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/2698906935.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/kuvejomozudojase.pdfIn PDF document text
    • http://www.centralperdana.com/file/tizebelavuridun.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/43412615652.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/84428172086.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/24682679950.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/xugedofovifiliteg.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/44432379470.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/12249107344.pdfIn PDF document text
    • http://masukpt1.com/contents/files/37249855890.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/40277776250.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/41687446425.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_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 10156 bytes
SHA-256: b59be9c1f742e55f275331d904a18c3cc109b578fa26d85552e9fc11c497187f
font_02_sfnt_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 18348 bytes
SHA-256: 06113ffc798bef821122e44aaaa2caef1cf0bfaecde3c8bed1a0bfa86c71d62b

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