Malicious PDF — malware analysis report

Static analysis result for SHA-256 540598172909208a…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 07:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 53b14b46842b7825f8e919fb5a307b20 SHA-1: c0e01fb9ad32a889923c94e7a35e8d328a065128 SHA-256: 540598172909208af06a18c3ca3a8e66fcea494772b015046b50a451299e220f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The embedded URL 'https://mezovuduw.ru/strik?utm_term=george+foreman+grill+chicken+cooking+time' suggests a lure related to search engine optimization or content farming, likely intended to redirect users to a malicious site. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://mezovuduw.ru/strik?utm_term=george+foreman+grill+chicken+cooking+time PDF link annotation
    • https://kabosasano.weebly.com/uploads/1/3/5/3/135398154/7927860.pdfIn PDF document text
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/wodurademogavuv.pdfIn PDF document text
    • http://leree4.club/dyslexia_worksheets_ks25pwpt.pdfIn PDF document text
    • http://cesaregaspari.com/cub_cadet_42_inch_zero_turn_partsdiaib.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/ojfMzgd/67646210382.pdfIn PDF document text
    • http://pedron.fun/lizapojuwibofuxomijolk7a5.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/Mji9Lhe/85691092290.pdfIn PDF document text
    • https://basuxujazako.weebly.com/uploads/1/3/4/4/134467371/4113643.pdfIn PDF document text
    • http://extrameets.fun/cantos_para_levantar_al_nio_dios_letrab9rsi.pdfIn PDF document text
    • http://it50disconto.info/61609557622wzg1.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/bdaae88c5b.pdfIn PDF document text
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/duvak.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/gogciji/best_deck_in_hearthstone_june_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/eYCji8B/detatov.pdfIn PDF document text
    • http://lexidubug.22web.org/math_word_problem_solver_step_by_step.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/mikibetiv/jeep_grand_cherokee_service_transmission_message.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/article_definition.pdfIn PDF document text
    • http://fukutinupamebo.rf.gd/10830114534.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/social_reproduction_sociology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/89055956857.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/my_talking_tom_apk_mod_mega.pdfIn PDF document text
    • http://kijenor.epizy.com/miss_asia_pacific_international_2018_winning_answer.pdfIn PDF document text
    • http://kiladogovato.rf.gd/nespresso_vertuoline_pods_alternative.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_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 5212 bytes
SHA-256: a2b338341b2cc3eb102076eff9da5a18a2ae17477d5bb21f90e861cdde4ba22a
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 11672 bytes
SHA-256: 5b1a6a938255be9cadee7384fd99ab9fb5195ba98bb4501eb261f2a0207dc600

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