Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a20d7532d61ee2…

MALICIOUS

PDF

72.8 KB Created: 2021-01-18 14:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ef02bf9461e5c1116c9613db9fac9cbc SHA-1: 2d6888b060e26799ad28ae3ecb07891d69eb9770 SHA-256: a2a20d7532d61ee2335ed465bbf2aec4870e3b3a7dd8ce2400dddd89c4c5b8f2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://leonvi.ru/aws?utm_term=long+division+practice+sheets+4th+grade PDF link annotation
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/jijidedes.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/mjdBejj/2788502657.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/mokojele-xetorezaxuve-wofobuvagonud.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/bajbc8g/rc_monster_truck_simulator_3d_printed.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ehj5UJw/gevenisagawatitiwixomot.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/Jjaidge/werewolf_evolution_lost_saga.pdfIn PDF document text
    • https://site-1177775.mozfiles.com/files/1177775/memmedbagir_bagirzade_kimlere_qaldi_dunya_mp3_yukle.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/7ggmxgc/75532538718.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/igijVid/vorutujalafoxotaso.pdfIn PDF document text
    • https://senugosuka.weebly.com/uploads/1/3/1/4/131454109/mogujutuperogexin.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/pebijitexon-damiferu-devuk-kekujavapu.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/Ugcjgja/klck_kustom_lock_screen_maker.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/c_partial_template_specialization_sfinae.pdfIn PDF document text
    • https://xejigidusulup.weebly.com/uploads/1/3/4/7/134730122/vevovejebado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekifovep.epizy.com/89887706945.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/e_p_c_ka_full_form.pdfIn PDF document text
    • http://vawolanuxoreg.epizy.com/lilasilelotak.pdfIn PDF document text
    • http://tifijawubizomed.epizy.com/kafopotikazunorexup.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_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 5392 bytes
SHA-256: f24b415c4d44c3befca23133184220ef2281e7424c6fbc027bb68c21dd5b9f31
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 10068 bytes
SHA-256: 05651f2fda4fcc142c4e4faa1ef029e13133fbed9412e3886940eb2e5ffec337

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