Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c3433865a01f87…

MALICIOUS

PDF

79.7 KB Created: 2021-02-16 13:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a8f844d8e9d19e0b53e85c49fa28039f SHA-1: c5c64796623ea2586f591d9289df415eeb8cc53a SHA-256: 38c3433865a01f8762f08c8d4444dc29aae17dd96c927a7bc12b642c18082eaf
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, identified by both heuristics and ClamAV as malicious. The ML classifier also strongly flagged this PDF. The document body, though heavily obfuscated, suggests a lure related to a 'Motif xs service manual', which is likely a pretext to trick users into clicking the malicious link. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document is designed to redirect users to external, potentially harmful content.

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://druttle.ru/wix?keyword=motif+xs+service+manual PDF link annotation
    • https://cdn.sqhk.co/radojiga/EiaSEIN/chikii_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_60228aea47149.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/jadjfhg/how_to_join_hacked_lobby_gta_5_ps4.pdfIn PDF document text
    • http://cryogen.me/recrystallization_of_crude_acetanilide_lab_report5772k.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/jcKgejc/dejumotenidesojexozu.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hdhdzja/84217374864.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/ju48ihb/color_detector_sensor.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/hiAHmDT/63094803474.pdfIn PDF document text
    • http://vostokzapad.su/english-_chinese_glossary_of_legal_termswtq71.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/kalanejaxutilif/the_chipettes_single_ladies_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/prevent_button_submit_form.pdfIn PDF document text
    • http://gitogopafo.epizy.com/cdc_vaccine_safety_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/parasitologia_veterinaria.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 4680 bytes
SHA-256: fe3a3b19d8a87e2ad9a1babaddbd44ba86c6c2b45b52c1bd29630b2a80541097
font_01_sfnt_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 5160 bytes
SHA-256: e5807025184a1d3560353d488dfd49dea36abeef1c509271df9bb7720d95fc5b
font_02_sfnt_off000109e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 12152 bytes
SHA-256: 7f85d0c144e8a1e350bc25a430399b11c47e4e690b56ab4895920bcbbbac6285

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