Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57d122f18fbccdc…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 04:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7efca334a9795db65424481ac446e4bb SHA-1: c9d2845d80253de3e6eb7a4a9a090c5186fc1534 SHA-256: d57d122f18fbccdc95579cb59a4de7a5af9065977f9757122a0053272938e5e3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

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://bologen.ru/123?utm_term=carmen+sandiego+word+detective+game PDF link annotation
    • http://damvglaz2.xyz/24235697591uog3c.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hahihb3/20105343539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5ff6b3003ce60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_6033c02029ae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_60081f75e83fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480387/normal_6039435153699.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/JDjgG8v/horse_games_online_free_download.pdfIn PDF document text
    • http://weareanonymous.org/fubaxojulupubasinugamo4mxxl.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/iajaLji/berkshire_pigs_for_sale_philippines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_601a1b9f11bd0.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/uYhjpja/zifofudemizerasozuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/oZjbngd/drunkn_bar_fight_vr_ps4.pdfIn PDF document text
    • http://spainwow.pro/wiwonirizowufebbxzbn.pdfIn PDF document text
    • http://teagreen.space/volumetric_light_c4d1tj9a.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/dCnhiif/84472707997.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/jw3BtFW/mens_haircuts_long_on_top_short_in_back.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/4ghdgcp/konabojavujituzulazanotex.pdfIn PDF document text
    • http://abwaab.su/django_reinhardt_chordsoe60i.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/b14e85e0-d421-41f5-b123-98e19e4eec84/prepositional_phrases_worksheets_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35c6363-63a2-4b8a-af67-26baf07bbc7a/28827961940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f2d42d-1ef5-4cf5-b3b8-6d259190f541/the_night_manager_streaming_season_1_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b99dcf3-9623-48cf-b4c2-73aaf425a53e/is_captain_underpants_a_banned_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/reddit_aoe2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/violin_christmas_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/passport_application_form_australia.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_off0000fe4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 5284 bytes
SHA-256: 788eec4e7d5cfc1324f6cb7abcd9097d49724fa1ee32f9118a127571b1178a75
font_01_sfnt_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 11112 bytes
SHA-256: 0d47b785facdb7f4f040b4343f198b9eaf23587a371d614fcb231783d3e0b230