Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ad2906c24f309a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 19:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8605a92d19775fdb1470597f1d47d365 SHA-1: ab3e83301ef4473797c934f10e1f6d4f21908e48 SHA-256: 82ad2906c24f309aca6987a6f1dfb0b4d788f7c8747fa033f191319d59f91744
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, and is flagged by heuristics as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=full+vhs+recording+tape PDF link annotation
    • https://cdn.sqhk.co/wadupaxi/jjje2Un/street_fighter_4_ps4_special_moves.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/kevenoxedeka.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/RXihJic/18696431329.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/5oDiaAE/zanuzax.pdfIn PDF document text
    • http://xonesasa.iblogger.org/comparing_unit_fractions_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/s8b8Iig/neck_pain_check_up.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/88275423161.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/BlgcJig/rogupebev.pdfIn PDF document text
    • http://faxizila.iblogger.org/lexical_ambiguity_in_semantics.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/96015996654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiroteta.rf.gd/jakijalivuraw.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/67812743645.pdfIn PDF document text
    • http://novizazabejapi.epizy.com/dagibabogidupiwam.pdfIn PDF document text
    • http://kidogip.epizy.com/gevinexovewifudov.pdfIn PDF document text
    • http://bideliv.rf.gd/when_is_green_eggs_and_ham_season_2_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/abbottabad_university_date_sheet_2018.pdfIn PDF document text
    • http://sepimenixinu.epizy.com/hp_p3015_fuser_kit.pdfIn PDF document text
    • http://wugulinutefi.rf.gd/what_are_some_examples_of_biotechnology_products.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/how_to_calculate_total_assets_ratio.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/usmle_step_1_score_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/37876710464.pdfIn PDF document text
    • http://kexeban.rf.gd/gimipoxejiremis.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_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5352 bytes
SHA-256: 6ed93d87d68a6e9b9bbc9f21857bd38f0e7f3841a2f794ff68b3f7a4104d3222
font_01_sfnt_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 10504 bytes
SHA-256: e9412717a1361ec7ce085ad74b3d0680dcf333960f1f849fb2f2d9d35a2954fd

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