Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea24b89f5feb3ff9…

MALICIOUS

PDF

84.7 KB Created: 2021-09-19 00:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 62ebd13bfcb7569c2b2aab9ca7d68642 SHA-1: 1b9d8a93488b247592e218b699a1929faa71023b SHA-256: ea24b89f5feb3ff9926e2de41777081c13c6ef8443a17a67a0c6cb9e0ec16fe9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic point towards the potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=application+to+unlock+android+phone PDF link annotation
    • http://carbonelite.ru/file/92671829537.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/ziwevefemow.pdfIn PDF document text
    • http://yuanfuconstruction.com/ckfinder/upload/files/44534988727.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/kezedasevifefudokokaliruw.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/3937835964.pdfIn PDF document text
    • http://full814.com/upload/files/wimipiwomagefeliwim.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/39513381825.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/nv9qv85o6kce2cbh599jahoh3b/23177776770.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/dobogujisejifadore.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/8290667453.pdfIn PDF document text
    • https://davaocarrental.com/images/file/65693842105.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/51991639191.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/dozetulewuxopanekid.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/96446828825.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/96467840711.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210907095005_03pmff.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/80677297090.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109191227092983.pdfIn PDF document text
    • http://strandedtattoo.info/file/99481072254.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161356ca028a8e---zibukerobewawezubufobeniz.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/xuwuxafubelutabobufasebi.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_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 10616 bytes
SHA-256: 7fc05607721e7f49a0b5607a5284bedeb29b2af5dec2ae055d9fd88437b1f07a
font_02_sfnt_off000116fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FC 17620 bytes
SHA-256: 78c93788fb210761f88e199fb77f75806e1602485641daad2d978dc5debc4e54

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