Malicious PDF — malware analysis report

Static analysis result for SHA-256 229ce7a295d7d7a6…

MALICIOUS

PDF

75.1 KB Created: 2021-06-04 12:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7d2f9c1ed21e90222ebe52bca7c69721 SHA-1: 3d13777011c0eb1b871220dc2275407ab38d733d SHA-256: 229ce7a295d7d7a619eb0c50b9621bfdbdbfd51176bea6128247591441139ce2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure, likely to direct users to the malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/pbw?utm_term=how+to+write+in+point+slope+form PDF link annotation
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/bogopovunegof.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/xaseximo-belidupebowegux.pdfIn PDF document text
    • https://razijidepafex.weebly.com/uploads/1/3/4/8/134891772/xutirarejulawire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_6002b4a89eddb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe25d1aa7582.pdfIn PDF document text
    • https://jabefebilinoke.weebly.com/uploads/1/3/0/7/130739415/safok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_606e7cdfaa3b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2c5bd8-1837-4a77-bedf-e7dcf0d49a95/low_dose_naltrexone_thyroid_eye_disease.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144449031/pogofalomazavututebimo.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144526371/50048508546.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/14979921893.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/printable_color_pages_for_kindergarten.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416562/gta_liberty_city_stories_cheat_device_psp_6.61_download.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144564489/five_nights_at_freddys_2_download_free_full_version_android.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144494427/too_much_too_many_enough_exercise.pdfIn PDF document text
    • http://patimedudemu.pbworks.com/f/73322595832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75773bf4-4494-4561-8118-22e985830687/what_is_the_best_pack_and_play_mattress.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144478521/jarisatiwixewazumumabuta.pdfIn PDF document text
    • http://veweran.pbworks.com/f/colours_kannada_serial_song_download.pdfIn PDF document text
    • http://podimil.pbworks.com/f/kick_2_south_movie_hindi_dubbed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c6dfc6-99d1-4968-917c-5920699b3548/mofazelinaxagosevubeb.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/42591836589.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/f/download_game_kick_the_buddy_forever_mod_apk.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_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 4888 bytes
SHA-256: 07cb616c1fd1667b97484b92e094f33407a12c84a7e20cfd82e43eb53988b95c
font_01_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 10796 bytes
SHA-256: 002e84f8676b7e4e0f284615c878fa2ed5b3c42ef442c76a665e4194c4c9dac9

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