Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc169fdc71676a9…

MALICIOUS

PDF

79.4 KB Created: 2021-03-17 00:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2774d114633c7694451dbb999c3fde69 SHA-1: 07ee0aa32f590348deedc0eb488f7bed3f9abe15 SHA-256: bbc169fdc71676a92206296d8ee3dba6413788dca6208f0229e48190325b723f
96 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 embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests it is attempting to impersonate a search result for an educational document, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=alter+ego+plus+3+cahier+d+activit%25C3%25A9s+corrige+pdf PDF link annotation
    • http://mscredit.info/zilizatozoslzqm.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/17294904160.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/37066083705.pdfIn PDF document text
    • http://xibomupazone.mypressonline.com/algebra_1_pretest.pdfIn PDF document text
    • http://hookup153.space/tanzania_one_bongo_movieb9sl0.pdfIn PDF document text
    • http://gprofights.ru/can_dell_optiplex_390_run_windows_10iba65.pdfIn PDF document text
    • http://eglo.club/roomba_model_560_batterykke9t.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/26478765511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6176d9a-fdbd-485a-a334-a8bcef330d8f/xunuvigadidelepu.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/fugufugilosuz.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/amazing_grace_song_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205ddf7d-3945-4d63-b88a-f4ecaa2da07b/viva_water_cooler_hot_water_not_working.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_03fbdf272c9441bc8339df07f25ba6ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zijivevip/gimusemojaxirekujejofavus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd0faf8-f0a7-4725-ba73-9068a276e5d9/dork_diaries_11_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/civ_vi_steam_guide.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/33025926970.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/togixeruxi.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_2192fc905cd2435090e7d4e320d48c91.pdf?index=trueIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_353befa6623e47acab71e0c936bf9f1e.pdf?index=trueIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_db13b8a3563b4f6d8b900e9518298154.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pipaneku/us_history_regents_answers_january_2019.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 5772 bytes
SHA-256: 4a90f3aafbeb595825202eb9f77930b93c39e910f244c09d3c7761f02090de0c
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 13056 bytes
SHA-256: 6c26fdbd28e30168e34059aef7a534546a4d630ffe5f584bc66ee235b547805c

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