Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8b08bcf094a125…

MALICIOUS

PDF

81.4 KB Created: 2021-03-13 15:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68d5d60caacafd886f27ecbebcb81d0 SHA-1: dcb32d6e4a818f3bf31c57511d5522f6c6a1ecb6 SHA-256: 2e8b08bcf094a1253390d7af9f8b90ceda15537525cddaf922a1d9c302d2d918
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that appears to be a lure for recruitment information, likely to trick users into downloading a payload. The presence of embedded URLs and the ML classification strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=kptcl+recruitment+2019+notification+pdf+kannada
    • https://cdn-cms.f-static.net/uploads/4366647/normal_602be5b7e0d01.pdf
    • http://hyipinvest.site/what_does_priority_date_mean_in_uscis30d6i.pdf
    • http://linefofaxugedu.mywebcommunity.org/pukal.pdf
    • https://cdn-cms.f-static.net/uploads/4501482/normal_604a56333c492.pdf
    • http://souve.me/96511762191vn32s.pdf
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fd877c50ca8e.pdf
    • http://keepxufi.space/convert_to_word_doc_adobe_readeryjvxo.pdf
    • https://static.s123-cdn-static.com/uploads/4446770/normal_600927c1b08a3.pdf
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fdc9f239058d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xazopufegi.onlinewebshop.net/occupational_health_and_safety_management_a_practical_approach.pdf
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_748580a7b59347a58dad6c4832a549be.pdf?index=true
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_fd42465fbce04f07b0cf2b9a98fd7c2b.pdf?index=true
    • http://rorokepu.atwebpages.com/meaning_of_validity_in_research.pdf
    • https://s3.amazonaws.com/kakef/gozabonogutafopu.pdf
    • https://s3.amazonaws.com/bejikefowu/88081647354.pdf
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_04de273ddd1d4c53867d602e2d91f1bf.pdf?index=true
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_75313737c723462a8d646b358a084eb8.pdf?index=true
    • http://zupitatip.atwebpages.com/sepaneluganebatuvuwujago.pdf
    • https://s3.amazonaws.com/sefipa/47073183347.pdf
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_73d4d45ed5c14f68a34f8099f69c661a.pdf?index=true
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_1b2af6169328412da948dd5ed61d4e10.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e974.bin
76c387719577873969f9e5b2dcbe9b52192e7fc47937e2146c065578c0e86ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 5636 bytes
font_01_sfnt_off0000fc96.bin
b8f58b52f1c559854680f5509afd8e5524413e9e49851bce66461fb124de6ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 11080 bytes
font_02_sfnt_off00012285.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12285 16164 bytes

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