Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0794dedaa677878…

MALICIOUS

PDF

117.9 KB Created: 2021-02-22 17:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7608da82ae3f7e43230ddfdbcdc48c41 SHA-1: 7c8575186f53576f35b0a4079aed65e3c0e7e73b SHA-256: b0794dedaa67787860c49c42b0001b8f9a7a86b662fe3f2a0782880f6983e808
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm strategy to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such PDFs for malicious redirection. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into downloading further malicious content, likely phishing or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=surah+yaseen+in+roman+english+pdf+download PDF link annotation
    • https://cdn.sqhk.co/zaniridut/8GgegQU/star_wars_rise_of_skywalker_emperor_palpatine_theme.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/2cd5dca.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/LsieLij/80207047816.pdfIn PDF document text
    • http://metazexepajesen.22web.org/what_is_a_currency_war_and_how_does_it_work.pdfIn PDF document text
    • http://com-servers.online/metodologa_dela_investigacin_roberto_hernndez_sampieriup0no.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/d7d0b686.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/fHigehe/77931101031.pdfIn PDF document text
    • http://rankingcoach-seo.com/86326725485720ki.pdfIn PDF document text
    • http://zelenege.iblogger.org/live_life_golden_ringtone.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/7812d9d4119b.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/ijcocEj/app_creator_pro_apk_free_download.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/mubedesif.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/juvuraguvutoxif/pewepogaxutiv.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/estimating_square_and_cube_roots_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/minolta_srt_201_lenses.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/revev.pdfIn PDF document text
    • http://buwomir.epizy.com/bond_amortization_calculator_excel_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D03 5752 bytes
SHA-256: e8d84810b00d584824b84ca4b740f0ab9516d716caff80e4e91645e17c7dd910
font_01_sfnt_off00019087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19087 11008 bytes
SHA-256: 5d56e90b740ce9cba7eab8a9dfaa34e7c4d1fc60c73ab579bc19c0462ed9add5
font_02_sfnt_off0001b54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B54B 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

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