Malicious PDF — malware analysis report

Static analysis result for SHA-256 d501f20446db0f84…

MALICIOUS

PDF

77.1 KB Created: 2021-04-15 00:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4e461c7b663476e3457aed1f6035fad5 SHA-1: 8ed39ee61d87c2c2af383169fbd1154ac039c271 SHA-256: d501f20446db0f8430ea85f1c6a66e89d3ee50cef6fc07a37609196ba732b4fe
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high ML classifier score, along with a ClamAV detection for Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be related to a tutorial, likely a lure to encourage clicking the malicious link. No scripts were extracted, but the overall pattern suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=tableau+tutorial+for+beginners+udemy PDF link annotation
    • http://berefiruzo.mygamesonline.org/daily_speaking_english_words_free_download.pdfIn PDF document text
    • http://datingsexchat.site/mudowejebijulegk40d1.pdfIn PDF document text
    • http://springwin.space/vewisabexokelowokugunuredn3313.pdfIn PDF document text
    • http://grenkasalo4.xyz/rexawilojudekamea48b9.pdfIn PDF document text
    • http://itabody.space/35777796470a8kjz.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/metubevozisul/interpretation_of_romeo_and_juliet_prologue.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/facebook_now_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b3b2a-bfd9-426a-a71a-5f20093525b8/zejawix.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/airship_ff14_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978c4435-cdf6-420e-91ee-501b216450a1/17212977116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41d8428-99ba-4091-9ad9-0ce30af264c4/what_is_the_religion_of_the_greek_gods.pdfIn PDF document text
    • http://livirava.atwebpages.com/kopigepej.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/wefijumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828d5517-8ba4-4b13-9fc1-3ef27b7e7c89/what_to_say_firing_employee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb416b4-38e1-4b79-87b8-1ff470fb063e/what_are_the_42_laws_of_maat.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/mr_sandman_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f386ef0d-633f-4031-8883-e6aad71ac942/how_to_reset_nordictrack_treadmill_2450.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/bach_air_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e31180-be7c-41e7-8118-dc046a9bb117/diwigo.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/event_critical_path_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/1392616843.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/29243279688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c713601-6a76-4b8b-87c4-f11f69322dcf/a_suitable_boy_episode_2_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72adb75e-d188-4189-ae78-ae477934ee82/11347097640.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/when_2_worlds_collide_movie.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_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 5420 bytes
SHA-256: 1bc2d3ae7fbeeb59e7c4521c8d4dbd277dc6d76bebbc4fc6cb6e6f963c51344b
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 10620 bytes
SHA-256: 2561357224dfbba1186da4d4f8439cedee83e6cf8b357beae73e784dde90ec72

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