Malicious PDF — malware analysis report

Static analysis result for SHA-256 661d9a8c8cdd32bf…

MALICIOUS

PDF

69.6 KB Created: 2021-02-14 22:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4072e3cf61e65b4bdfe259203d81a3d SHA-1: dd58347fb043ce2f3d94214740fa9a0456260ed1 SHA-256: 661d9a8c8cdd32bfac787345a3331c8edeb307fd255070e804f3340d2bd1b00b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure, disguised as a trophy guide for a video game. This suggests a phishing or social engineering attack aimed at tricking the user into visiting a malicious site. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attempt.

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://bologen.ru/wix?keyword=assassin%2527s+creed+3+liberation+trophy+guide
    • http://loxebosobudi.66ghz.com/blade_s_edge_mountains_quest_guide_horde.pdf
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5fc7fe89b11ea.pdf
    • https://static.s123-cdn-static.com/uploads/4477638/normal_5ffe918164826.pdf
    • https://cdn-cms.f-static.net/uploads/4485926/normal_5fd1146f3e69d.pdf
    • https://cdn-cms.f-static.net/uploads/4474475/normal_600a9bfb5ed12.pdf
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fcf6d320b0a4.pdf
    • https://cdn-cms.f-static.net/uploads/4451544/normal_602291fdb14b6.pdf
    • https://cdn-cms.f-static.net/uploads/4411682/normal_6019c6c7aa979.pdf
    • https://static.s123-cdn-static.com/uploads/4469116/normal_5fcb0529d710d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sizabo/adobe_flash_player_cho_android_7._0.pdf
    • https://s3.amazonaws.com/pivetuzadujo/android_install_apk_without_adb.pdf
    • https://s3.amazonaws.com/tozaduliwubega/google_chrome_32_bit_windows_8._1.pdf
    • https://s3.amazonaws.com/dorulusof/kojitafu.pdf
    • https://s3.amazonaws.com/zuwosil/kafimiroxenolozuwaku.pdf
    • https://s3.amazonaws.com/pazerogasarinu/konozu.pdf
    • https://s3.amazonaws.com/jopomodilamego/aala_baburao_dj_song_free.pdf
    • https://s3.amazonaws.com/resisuna/actors_equity_401k_form.pdf
    • https://s3.amazonaws.com/gezetega/skyrim_bleak_falls_barrow_puzzle_answer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d201.bin
089e023f8afe929c1dad132cf3b8a8eb277a29afa6d67969641bb036a35a56aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 5764 bytes
font_01_sfnt_off0000e5a6.bin
3ec898da559e946e591cb4ebb68e0ff182160176334f5f2e2ac7bbab3266fe8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 10244 bytes