Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cf7474ba026e01…

MALICIOUS

PDF

78.3 KB Created: 2021-03-24 18:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7f8a8b9bd976c9e8e2fe15d38384625f SHA-1: e6da0d3e32614a0dfc4f81636ee630c4865d4f54 SHA-256: b1cf7474ba026e017827aa9b2bb312cca87c57eb127025ba291c19780bbd549b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains or link farms, suggesting a SEO poisoning or phishing campaign. The embedded URLs likely lead to further malicious content or phishing pages.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=city+of+bones+graphic+novel+pdf PDF link annotation
    • https://cdn.sqhk.co/raserijene/hhgehfp/fallout_new_vegas_zion_national_park_snow_globe.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/mPFWFjd/magic_earth_navigation_maps_test.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/8741397.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/7446679.pdfIn PDF document text
    • https://cdn.sqhk.co/wevubuse/ehhFgc3/vasulasujojalewadisikuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/gggfigI/pilowamijizowigiku.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/hjjcxjd/67328202171.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/gcgcha3/verofubaro.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/hiegfJr/photo_editor_collage_maker_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/XIjeOhg/2_player_racing_games_pc_free_download.pdfIn PDF document text
    • https://litudawugo.weebly.com/uploads/1/3/3/9/133997631/gaxat.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/d8c303b7e6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvalinifotu.rf.gd/jabberwocky_piano_sheet_music.pdfIn PDF document text
    • http://detuzojezil.rf.gd/css_bangla_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/business_law_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/vitamix_blender_tnc_5200_review.pdfIn PDF document text
    • http://dijazulebok.epizy.com/kasetizatojadegux.pdfIn PDF document text
    • http://kafozubasopuji.rf.gd/aadhar_card_correction_form_online.pdfIn PDF document text
    • http://futilanejorowof.epizy.com/voltage_transformer_theory.pdfIn PDF document text
    • http://zukuwegafedes.epizy.com/15994344362.pdfIn PDF document text
    • http://wupubobetob.epizy.com/kugalubesesoju.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5624 bytes
SHA-256: 578b6c289b7d7bef2a6366a8eaa71c5bbb944f70fe25e0d4c5bab5e58b720266
font_01_sfnt_off00010444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10444 11980 bytes
SHA-256: 5ba22a0f2bc594c58e9b32301a7cea891aa9fa0d35152d1c0f54a5e14f454a5a

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