Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8df9739fdb84e2…

MALICIOUS

PDF

103.7 KB Created: 2021-02-28 09:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6b4d0fb63d7dba261bb6000ee9ea4aec SHA-1: d43cc8ebdefa460154779e903826b9a4f04d0a81 SHA-256: 1c8df9739fdb84e2d5acd575829a3a68934567a8f426ea685bf319ec037f4a6b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, which is likely used to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to technical topics, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=difference+between+data+science+data+analytics+and+machine+learning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391037/normal_600c84ae96244.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/cojjijz/technic_launcher_minecraft_windows_10.pdfIn PDF document text
    • http://carbags.site/miboxosinufakepexezudori0dhh1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393890/normal_5fe155abaa79d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5ffcd144702c4.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hXYRcBZ/risk_probability_impact_matrix_example.pdfIn PDF document text
    • http://dkmz1.club/wolf_of_wall_street_full_movie_google_docsw3ls8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475725/normal_602df873e20ce.pdfIn PDF document text
    • http://huseyincanx.com/tai_chi_exercises_with_picturescek58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_603201c54b584.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/pjbijdY/givikufanuveve.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/EcKigID/62789488838.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/gxKgjjz/gun_factory_shooting_range_nyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6033a8d7d8010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_5fe8dfcd32596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/99442830597.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/apkpure_pc_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/mhw_iceborne_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/chello_divas_2_full_hd_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A74 5448 bytes
SHA-256: db887487dcd9f2155966e4cbb9dbb71cf69f2592de8e13eed226c23c452728e8
font_01_sfnt_off00015cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDC 11092 bytes
SHA-256: 30e0d5cf32312ca0f66026c6f7ccd0806609b6857cd4752b683783ff7d246a2c
font_02_sfnt_off00018243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18243 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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