Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa63b6085f2d030c…

MALICIOUS

PDF

65.8 KB Created: 2021-02-11 12:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1e07c68f8d97553450c095229393c977 SHA-1: a6f87e0e892f69704031058d29144793e869ab5a SHA-256: fa63b6085f2d030ce788efdd7a6dfb3fbf62c2317a39796a6bdb354c28a3aa79
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 a URL that appears to be a lure for downloading an 'apkpure' related file. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest a phishing or trojan delivery attempt.

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://jacksth.ru/wb?keyword=counter%20terrorist%20mod%20apk%20apkpure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fe30043338c2.pdfIn PDF document text
    • http://sojipen.22web.org/aphrodite_story.pdfIn PDF document text
    • http://jakuzilikigo.iblogger.org/charge_plate_monitor_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5ff6042d9ed51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472763/normal_60034a81b82c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fd3a73e8b9d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legenapi/im_so_lonely_broken_heart_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/adobe_acrobat_trial_version.pdfIn PDF document text
    • http://nufufud.epizy.com/2386311463.pdfIn PDF document text
    • http://gujimimokogofe.rf.gd/android_9_pie_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bluetooth_pc_windows_8._1.pdfIn PDF document text
    • http://fakefujakarip.rf.gd/chamberlain_whisper_drive_plus_3_4_manual.pdfIn PDF document text
    • http://penoputibilexo.rf.gd/wapadimiwolexaguvojoxes.pdfIn PDF document text
    • http://kojaburu.epizy.com/75565384225.pdfIn PDF document text
    • http://jeloneliva.epizy.com/bomberman_land_touch_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/fitbit_ionic_manual.pdfIn PDF document text
    • http://sufapanizesemot.epizy.com/baishe_srabon_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/rockabilly_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/25149154432.pdfIn PDF document text
    • http://xuxamasisovuku.epizy.com/24117887974.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/xigexirizubuxida.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_off0000c5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D6 5044 bytes
SHA-256: c410b2206b5f7e89fe7bfd443c3bb0c81618a77bc471247b7ae61b88f2e24dd6
font_01_sfnt_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 10224 bytes
SHA-256: b1e36f814ea9ebafd140b68a1eebee7fb3003a567b219610b2e08405b5d9fa5b

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