Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0988ddfec2d48d5…

MALICIOUS

PDF

75.9 KB Created: 2021-09-29 03:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 76f51b1f8a5f605ed55d34b15a42d905 SHA-1: d40f39c60bfe23501571cc2a4a0356671d61468a SHA-256: e0988ddfec2d48d5295b0e1092d737b53abe573a00a4bad8c52258b18f1ad342
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://medvor.ru/uplcv?utm_term=low+end+android+emulator+for+pc PDF link annotation
    • http://candybeauty.vn/upload/files/16672972562.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/jugam.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/72524931975.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/kp30cdo53pu9q49d2nte79efnb/29201868285.pdfIn PDF document text
    • http://herve-coiffure.ci/files/68289364645.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/rifomot.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/gifezaxaxafuxi.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/230759770.pdfIn PDF document text
    • http://evola.it/userfiles/files/zojajavorube.pdfIn PDF document text
    • http://vibratingsieve.com/d/files/nizuna.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/nedejorebizodawutilub.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/wekegorewojozunukitip.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/98468911522.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/vadekukikukadi.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/vajimolokulu.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/mixilitinojax.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/10597716918.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/telofakapunikiwasazalo.pdfIn PDF document text
    • http://apsons.eu/files/file/51197905328.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614346aef0b03---suvozovujotusunedutiru.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/14608898077.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/87449843688.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/kisutajemuvefijuw.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_off0000c0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 18812 bytes
SHA-256: c3730e869cae82545eadb42e6894a207e802d288f9841d92dba7cca97b99f216
font_02_sfnt_off0001098b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 10756 bytes
SHA-256: bdf1faf1ef1f1d59eba4a4738e6a1f6a1c61202f7dcf91f560df53f17fc37bba

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