Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44f5ed95f630346…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 12:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d31e9552a35686301547ed3f96e33d35 SHA-1: 52eb2e20eee9cbd076d5aa8c44bbc89240305a75 SHA-256: b44f5ed95f6303467019d5d78b8b3c1265fac768172111a10b90400c2ca11dd8
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 0.9997

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://crophysi.ru/strik?utm_term=does+august+die+in+scary+stories+to+tell+in+the+dark PDF link annotation
    • https://vaniselati.weebly.com/uploads/1/3/5/2/135293279/6231636.pdfIn PDF document text
    • https://dexulivixuwe.weebly.com/uploads/1/3/0/7/130739852/xumiropetunaki.pdfIn PDF document text
    • http://mkr-olimp.info/pokemon_yellow_guide_booknrjck.pdfIn PDF document text
    • https://pupoximoz.weebly.com/uploads/1/3/4/5/134584835/kununafipidoda.pdfIn PDF document text
    • https://mijuzitomos.weebly.com/uploads/1/3/4/6/134662295/dodoneluj_bodut_fijugesoni_jumone.pdfIn PDF document text
    • http://latencfsrt.space/almanac_missouri_weather22squ.pdfIn PDF document text
    • http://hookup754.fun/ruwidopexakajoellb4.pdfIn PDF document text
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/balidu_gegewivurisiz_gugixagijixos.pdfIn PDF document text
    • http://peuly.xyz/tupelepusekopikajunonojax1z9ak.pdfIn PDF document text
    • http://creditactive.info/management_information_systems_managing_the_digital_firm_8th_editionwi4bz.pdfIn PDF document text
    • http://trynon.xyz/xosunse9o8.pdfIn PDF document text
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/85bd4cab.pdfIn PDF document text
    • http://oneitstore.info/kitelazewuzejugunujunurysy1w.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/sojapodavav.pdfIn PDF document text
    • http://neyroskakalka.site/el_amor_en_los_tiempos_del_colera_analisis_de_personajesvz7db.pdfIn PDF document text
    • http://rekararavufi.iblogger.org/the_blue_book_of_grammar_and_punctuation_11th_edition.pdfIn PDF document text
    • http://pmaider.com/onkyo_tx-sr705_receiverarh74.pdfIn PDF document text
    • http://tozepimituxagus.iblogger.org/84_charing_cross_road_watch_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupagiji.epizy.com/alkaline_diet_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/atoll_3._3_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/chaar_churiyan_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/10336447755.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 5368 bytes
SHA-256: e4ff17932d17a5a9c695980b3d2cf01a2bd122dcc757bd2c477f23fe6e86c6b5
font_01_sfnt_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 11048 bytes
SHA-256: 4b8eaf591a27e2a84d75bd55958de159111d34c5d043d323483a7109363d5d3a

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