Malicious PDF — malware analysis report

Static analysis result for SHA-256 948971c5df30ccc6…

MALICIOUS

PDF

125.1 KB Created: 2021-03-28 20:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8fe581020586ae4537af4f1226aff4e4 SHA-1: 7a81678345a15214fea644d069de2ca63a217049 SHA-256: 948971c5df30ccc6bb7d095af54f84d5d9a131afebb6aaa5f104315dc9210a96
224 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ML classification and ClamAV detection. It contains numerous links to potentially malicious or disposable domains, such as http://radanews.site/xoxumininobuminobosusugogoterafmmebw.pdf and https://yafferge.ru/award?keyword=features+of+graphical+user+interface+pdf. The presence of these links suggests an attempt to redirect users to malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=features+of+graphical+user+interface+pdf In PDF document text
    • http://italysummer.space/97269071310b8m98.pdfIn PDF document text
    • http://wiinorama.fun/2020_saudi_aramco_operational_calendpwue2.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/adjective_and_adverb_prepositional_phrases_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_6009a81aa0c3f.pdfIn PDF document text
    • http://familyit.pro/archeage_error_126rws53.pdfIn PDF document text
    • http://radanews.site/xoxumininobosusugogoterafmmebw.pdfIn PDF document text
    • http://thehensleys.org/how_to_collect_on_a_judgement_in_virginiae4ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_602e1b15ccd80.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/clinical_pharmacy.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/tamil_news_paper_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_6006f1af83122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_6010d4508508c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_603dc673e963a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_60054d31d9424.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/bezutu/gupowunarogizas.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/magisterium_4_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d9e2cd-56d0-4442-a384-886d399ff057/47136222053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1770fc53-7ea1-4ba4-9ed0-b2d90ed6b23a/nemirof.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/vademujazuda.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/answer_of_how_are_you_going.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d252cc94-7077-4f6e-a7e4-ac64bb25fea6/is_there_a_recall_on_chevy_impala.pdfIn PDF document text
    • http://pigutun.myartsonline.com/why_do_i_have_blood_in_my_eyeball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6bce9c-d7c3-43bc-94dd-05d57e248690/ejemplos_proceso_de_investigacion_de_mercados.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/android_sdk_market_share.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/rolotorevomejub.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_off0001aa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4B 5372 bytes
SHA-256: dcdff779a2e504b23f530883f3dec5cfdbe64fc44a5d71a6441f31e6f845950d
font_01_sfnt_off0001bc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC90 12524 bytes
SHA-256: ee06f5d3c7a21f1826c0b6dbbd64920144fac6e3547bb7b95ae0fd4392b9317f

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