Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e599ed536fd6b16…

MALICIOUS

PDF

78.1 KB Created: 2021-04-03 14:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e1797e6c5133ff4a5b992e77ffd8d46 SHA-1: 207385eac71502e38e7f65e3a4cd2151d2e13014 SHA-256: 7e599ed536fd6b160dbbbc14c41b93efc74130b756df597f67bad0d31c88d158
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URIs, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to drive traffic to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=2017+ford+mustang+gt+for+sale+houston PDF link annotation
    • http://kavanepamor.iblogger.org/63134367644.pdfIn PDF document text
    • http://pl50off.info/t_mobile_personal_cellspot_router_not_working5g75x.pdfIn PDF document text
    • http://rating-bookmaker.ru/dimegazijarozinefaguihqie.pdfIn PDF document text
    • http://mybatut.store/what_is_the_eligibility_for_digital_marketing_courseotnxe.pdfIn PDF document text
    • http://zuluwana.iblogger.org/alcatel_u3_3g_user_manual.pdfIn PDF document text
    • http://ritixabig.iblogger.org/rodimedesikig.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/hong_kong_attractions_map.pdfIn PDF document text
    • http://itwomen.space/poulan_chainsaw_carb_diagram87ilw.pdfIn PDF document text
    • http://shoop-ff.ru/print_reading_trade_competency_test_answerspwhag.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/enjoying_a_cup_of_tea_quotes.pdfIn PDF document text
    • http://vladport.ru/journal_of_the_first_voyage_to_america1bh53.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/plan_de_auditoria_interna_ejemplo.pdfIn PDF document text
    • http://cafe-cok.ru/mukitzf4ii.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/125895760gvlk7.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/what_are_the_elements_and_principles_of_sculpture.pdfIn PDF document text
    • http://koxenatez.22web.org/king_arthur_knights_of_the_round_table.pdfIn PDF document text
    • http://onlinetiser.website/88180950493opsgt.pdfIn PDF document text
    • http://kozodomu.22web.org/62502053256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_cfcd6b11d1684fa9b379bd42633c27f0.pdf?index=trueIn PDF document text
    • http://sisizovomejefi.epizy.com/natalidenuzesunabuzabuma.pdfIn PDF document text
    • http://rivejekab.epizy.com/jurnal_bioplastik.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_7f8029774aa2442dbefa8712c75000a9.pdf?index=trueIn PDF document text
    • http://kedenutorufet.rf.gd/10749366313.pdfIn PDF document text
    • http://kixasudasiwub.epizy.com/sniper_class_02-1.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_58f8aad496404ec99f078e21cf5f7aa6.pdf?index=trueIn 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_off0000f0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 5632 bytes
SHA-256: 69b3349daaae70ff78832824d10295b6eae30e21b5b3d3431776da8faeb06aa9
font_01_sfnt_off000103a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 11412 bytes
SHA-256: c98f0699a2908f4e2512676b3084555d2631bed81fc2e997546b7d113221d9c5

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