Malicious PDF — malware analysis report

Static analysis result for SHA-256 edba0aea56722e5c…

MALICIOUS

PDF

84.9 KB Created: 2021-08-01 02:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e8e1c1eb75e22c36ce15983c6fba5ed0 SHA-1: f04339068aa09fef715329d8fc9b6c06351064b9 SHA-256: edba0aea56722e5cce33c009732785db996221f4c9c7b6b2ae472efd4b8ab1ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary goal seems to be redirecting users to external content, potentially for phishing or malware distribution.

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 https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0b41a43c04ffe31b5c24bab3e273c7d4/sebowugijatetofigiw.pdf In PDF document text
    • http://tensoinox.com/userfiles/files/sufewewebowojomoma.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/52729979169.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/divejuvirojevupug.pdfIn PDF document text
    • https://petikdaun.com/contents//files/53626505981.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c484317c975---83382095075.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vbocg0dbe7nvb25m69l9l3vdnh/fojigofarajog.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862f5440dc7---sapadadose.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/wefejarorivifukevejobux.pdfIn PDF document text
    • https://keongracun.org/contents//files/61559213419.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/mureweped.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/62532321977.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/87233301577.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/mitimemijesufizesujezum.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/53259508889.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/1598363687367a705792942356ad567e/gasib.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/gufupaxifi.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/50096652502.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c5acf960955f4f3b8b48b88f11fa3cf1/39374655143.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/82740898987.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/e45df5cbb8e556b6182f1825a65e5776/12764937350.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/skoasi4n8qu9m9v27sbre1cvud/85528771221.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/efsf5gt18eivbtl1l6o8v0eh0v/87229745859.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/56374616651.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/16499753710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=vishnu+sahasranamam+kannada+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 16172 bytes
SHA-256: 637a9dac0afc585f1f105c2de408df99420c2eea19216aca5c902ef31b2be0e3
font_02_sfnt_off0000fe85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 10912 bytes
SHA-256: afab77ad3bd98649e1f03e8972a62f34f371d5eb9b7c13aa08ea3adb6378712a
font_03_sfnt_off00011794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11794 17024 bytes
SHA-256: 5ec5019512721cb69f21419fb6c7adf70eafd984ecfd6429f02fb6f3a3399476

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