Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bb68b7fce02daa…

MALICIOUS

PDF

80.7 KB Created: 2021-02-16 02:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e322ba9ee8ffa04af54520d44acb95 SHA-1: c595bab36e3202f0f0aeb6a5341d2de833652c34 SHA-256: 80bb68b7fce02daabc65a544e51639c9cd7b0fa7ae7d5376cbf7986df349855c
96 Risk Score

Malware Insights

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

The file is classified as malicious by ML and ClamAV, with heuristics indicating an embedded external URI. The document body, though heavily obfuscated, suggests a lure related to 'printable fry's first 100 sight words flash cards', which is likely a pretext to encourage clicking the malicious URL. The presence of numerous unknown reputation URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=printable+fry%2527s+first+100+sight+words+flash+cards
    • http://lbaranaydin.com/prestige_sandwich_maker_with_removable_plateswgcvb.pdf
    • http://handler-autoscout24.com/kukefmvuqa.pdf
    • http://kenufapozij.22web.org/zarelametu.pdf
    • https://cdn.sqhk.co/tigixexaxi/heNrKYY/footstep_sound_effect_wav_download.pdf
    • http://tcerkovniekupola.space/enter_the_kettlebell_or_simple_and_sinisterb7jl3.pdf
    • https://cdn.sqhk.co/dodufiruw/xigMUhc/28639611120.pdf
    • https://cdn.sqhk.co/daxerarugak/hwygFic/nba_g_league_referee_tryout_2020.pdf
    • http://mscredit.info/dikudamikimixananiduvarc4wz8.pdf
    • http://creampiepow.club/pojazumpou5.pdf
    • http://micrometerdigital.xyz/27558123515yjrk6.pdf
    • http://cherrypimp.online/fox_mlb_world_series_contractwqadj.pdf
    • https://cdn.sqhk.co/dutaxato/chaPsjd/98930497973.pdf
    • https://cdn.sqhk.co/retobumoki/icTnnpF/38299576397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bawalidamovidud/baldi_s_basics_field_trip_mod_apk.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_off0000fc68.bin
6b7099def9874f6b27167d058c0bfe7dad3d02e2bf26c4a590a3eebcd55048c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 5844 bytes
font_01_sfnt_off0001106a.bin
26e2cbf5d7d14331c602131e39dbc589ed016c2770f19149760eb0569e875cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 10828 bytes

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