Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b77acf3c213dc93…

MALICIOUS

PDF

85.0 KB Created: 2021-05-10 19:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4719fd9bc85ba68d1db76548d7f7a5c SHA-1: ec9e3a6d9ee5b84c65abec912b9a23c4586fe67b SHA-256: 2b77acf3c213dc93d27a59bdd3251305a8ee4d30ef3f6e96e1c19bb282533b8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://seumenha.ru/strik?utm_term=graco+pack+n+play+mattress+sheets PDF link annotation
    • http://peromopativej.mypressonline.com/ipad_mini_keyboard_case_for_sale.pdfIn PDF document text
    • http://madewithsunshine.com/english_to_bengali_translation_dictionary_download8ng0l.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/N0F6Egc/sea_battle_warships_3d_mod_apk.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/20677701409.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/icjeEie/lededajawibufinado.pdfIn PDF document text
    • http://atomyimperial.ru/7681438736lhes8.pdfIn PDF document text
    • http://help-copyrighteamservice.com/32526725963tww8c.pdfIn PDF document text
    • http://idealicaitalia.website/damokapasikezoxelef4jw86.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/hiijmjh/rise_of_skywalker_general_pryde_death.pdfIn PDF document text
    • http://mainsale.info/night_marchers_movie_onlinekea7u.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/menifazetomoropu.pdfIn PDF document text
    • http://blacklaser.ru/27295099123n7y6a.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/GMRibL4/subway_fun_runner_endless_runner_games.pdfIn PDF document text
    • http://lumacy.site/what_is_a_winchester_model_94_worthola3a.pdfIn PDF document text
    • http://fastpeysistem.online/37294153212h6kf9.pdfIn PDF document text
    • http://hytri.com/862634290765iek6.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/hejqEgh/red_dead_redemption_2_xbox_one_age_rating.pdfIn PDF document text
    • http://plusstore.pro/subjects_of_special_study_examplesqpsp5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxelexudar.epizy.com/rotulumoxikukewil.pdfIn PDF document text
    • http://surifetopene.epizy.com/gapolasofaboromavib.pdfIn PDF document text
    • http://zapofekeba.rf.gd/renitopipajijelove.pdfIn PDF document text
    • http://wesatume.atwebpages.com/balibe.pdfIn PDF document text
    • http://mibovemijo.rf.gd/balanced_scorecard_powerpoint_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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 5372 bytes
SHA-256: 65cb1acf5fcf5200364a38741c9698efb02d2296d8d395f1761c104824a7537a
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 5236 bytes
SHA-256: 1eb1ffc3aa0edfee3a39ec0f645a04fd1e92464a3f13f64d7ad8e62c98584c06
font_02_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 11192 bytes
SHA-256: c85b3ef7ea44404f1cf1fed8b41dfa5379e19be42df8667f44b4642fb93cc75e
font_03_sfnt_off00013c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9D 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

Open this report in the interactive analyzer, or submit your own file for analysis.