Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92d6f741b427904…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 17:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 30b85f5a9b67a759706bf1222fab2a5b SHA-1: 42e0d12af463ae32610c9c5f05a41e4347652ab8 SHA-256: d92d6f741b4279044c1c049c2d8b0b6f527ea344baa0d0d533a12b2db65865b2
134 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 phishing or trojan threat. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'boi star token free' and authoring information, hinting at a lure for free resources or tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=boi+star+token+free PDF link annotation
    • http://polibesafonujof.iblogger.org/rock_band_4_pro_drums_xbox_one.pdfIn PDF document text
    • http://teagreen.space/batman_killing_joke_full_movie_in_hindibj0jx.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/wolff_sunvision_pro_24s_tanning_bed.pdfIn PDF document text
    • http://adanakebap.org/podebaxat71bh6.pdfIn PDF document text
    • http://baltika-trans.com/byung_chul_han_la_sociedad_del_cansanciomk97e.pdfIn PDF document text
    • http://ins.expert/34515026338yrqdo.pdfIn PDF document text
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/1734229.pdfIn PDF document text
    • https://bajixaxazuxu.weebly.com/uploads/1/3/1/3/131383864/vegejasigekebawaveg.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/disesubevipagata.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/5684678.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/2f1bec9ad34.pdfIn PDF document text
    • http://swiss-gear-top.xyz/92745903666venlr.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/jeravukifuzase_rijizadotizigo_toduju_tototixabezu.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/zunabadazuponujuf.pdfIn PDF document text
    • https://jesuzexujugom.weebly.com/uploads/1/3/0/7/130776612/muvomemixosu.pdfIn PDF document text
    • http://totakonepis.iblogger.org/tevelipamijo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bepukuba/bengali_video_songs_a_to_z.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/dewojexolonirogirutunajov.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/here_i_am_lord_lyrics_methodist_hymnal.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/how_to_draw_a_simple_bookshelf.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_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 4840 bytes
SHA-256: 377ddb7063fae93491f681bfa0f78962a59d65b5224a07e5dc16e8462bac265e
font_01_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10544 bytes
SHA-256: 11de64dd00ba6702cebfd32543e6b33d3a0d23e3012da12bb917357cfb71a2a7

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