Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f48cdd211f2dd3…

MALICIOUS

PDF

80.1 KB Created: 2021-03-23 19:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f75e5fabad3a7f8cabe419e806e8065e SHA-1: 2117a953ba0791075539defa0aa99cf848e97638 SHA-256: b5f48cdd211f2dd3e91aebe1a368e67e22ab0ecd683cb89bf6e29ef34d8e9f3b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/wix?keyword=i+am+legend+book+pdf PDF link annotation
    • http://vereffka.xyz/what_are_the_oldest_biblical_manuscripts0phrg.pdfIn PDF document text
    • http://reduslim-buy.site/how_to_use_a_george_foreman_grill_for_steak769rq.pdfIn PDF document text
    • http://ferategaj.scienceontheweb.net/vaccination_schedule_2020.pdfIn PDF document text
    • http://damvglaz1.xyz/class_11_english_book_state_board0ph3k.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/zafegax-juligaloji-dogotalenumi.pdfIn PDF document text
    • http://roflan.site/racecraft_build_and_race_mody7p4d.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/difinesizavozo.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/wolimifesitusekogeb.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/socit_anonyme_dfinition.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/goviwutemafutiluvot.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/sparepro_catalogue.pdfIn PDF document text
    • http://kersita.space/libros_de_fisica_gratis_para_descargar8eqgz.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/16113117413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafuvaxuxele.epizy.com/nagotibabewepenabapebamop.pdfIn PDF document text
    • http://bilisedutave.myartsonline.com/gubamilapexadibolazidoka.pdfIn PDF document text
    • http://jipowefata.epizy.com/gulabi_aankhen_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027f67f6-1bee-4408-b825-230c48497e3d/how_much_does_college_cost_in_the_game_of_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee86fb1-ab0a-4245-80c7-1da76076843a/40315817725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0262e25-d159-4035-901a-abf0c4896475/daguxifomewegobiduxulov.pdfIn PDF document text
    • http://lutudapetasuk.rf.gd/difference_between_centroid_and_centre_of_gravity.pdfIn PDF document text
    • http://pexevogawi.epizy.com/twitter_apk_android_4._1._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfe4067-79bb-447a-b0b1-13fa12e6e152/90248355960.pdfIn PDF document text
    • http://setowibuvi.epizy.com/docs_google_forms_viewform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7092a22d-a270-4065-b570-e4193abc0302/zebagepixon.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_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 5228 bytes
SHA-256: d242abedec3050d2efc56d0ff3edb1f5d5ac64d41e23abf75bc94129a6c5044b
font_01_sfnt_off00010a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7B 11432 bytes
SHA-256: 2d3bb2a7e9cb5817bda822977fcd05580f9ecde291ba3bba87eecba23bb5891a

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