Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d53026f69ba7f1a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-15 10:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3873333f22cfb6cd156cbee303d8e9a4 SHA-1: 517e6b468efdbe3e62bad7fb1186c54f8107e5cf SHA-256: 0d53026f69ba7f1ac07147d107c8966899a816bfae678af7743aac44ae571668
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'English class 101 vocabulary pdf'. The presence of an external URI and the ML classifier's high confidence score indicate a malicious intent, likely to redirect the user to a phishing site or download further malicious content.

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://pelibifir.ru/strik?utm_term=english+class+101+vocabulary+pdf
    • https://cdn.sqhk.co/kizulajeli/ANFghrx/pine_forest_hdri.pdf
    • https://cdn.sqhk.co/gufezitaxato/JgdtMvU/cbs_sports_franchise_football.pdf
    • https://cdn.sqhk.co/porodiwaten/jjjjdjv/15989621578.pdf
    • https://cdn-cms.f-static.net/uploads/4367312/normal_601ae0ba12ad0.pdf
    • https://cdn.sqhk.co/nujudemugipi/dgeYfii/wireless_mic_for_iphone_11_pro_max.pdf
    • http://stylecurtains.com/43296187548pwvps.pdf
    • https://cdn.sqhk.co/vugomupuzisa/3g4gjRv/92370843185.pdf
    • http://matteset-spon.space/bukabelojowujimekalvuvb.pdf
    • https://static.s123-cdn-static.com/uploads/4483836/normal_5ff8f52d062d7.pdf
    • https://cdn.sqhk.co/tiwumixe/6qiciaC/gekupoxigemo.pdf
    • https://cdn.sqhk.co/zunesunatiri/iiDhcBL/98231795864.pdf
    • https://cdn.sqhk.co/mivadunoxo/3ijieFx/samsung_smart_tv_games_app_download.pdf
    • https://cdn-cms.f-static.net/uploads/4449781/normal_6015143a78b6c.pdf
    • https://cdn.sqhk.co/buvovemif/Uihjbji/blue_moon_song_selena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d2192cfc-54e7-425e-be00-24c6fdc5d0b7/62165215114.pdf
    • https://uploads.strikinglycdn.com/files/b256c1e0-ba9c-4528-b9ae-77f978d4dc96/35761658541.pdf
    • https://s3.amazonaws.com/nezanurugega/22546570078.pdf
    • https://s3.amazonaws.com/gajabedafot/95738903182.pdf
    • https://uploads.strikinglycdn.com/files/1a4292e1-ef82-4d26-acc1-53c22da4bdab/loruf.pdf
    • https://s3.amazonaws.com/tanikanaw/human_anatomy_atlas_2020_free_ios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f006.bin
83f5a36fd46787a2f3d49168adb38bb3a3b697a2006ba57a03efcd1f04cdcf9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 5556 bytes
font_01_sfnt_off000102d4.bin
93fe2973a2bf47925912dceac48706a6183a48e8769a36d937f4969d93a70212
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 10228 bytes
font_02_sfnt_off000125e8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 4324 bytes