Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4d72dc1a65483c…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 05:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 524527a1b519ccb57735d95249313744 SHA-1: 72252e1bb408f2a9ae8b5007819c2d55bdab6833 SHA-256: 2e4d72dc1a65483c9997fbc1b07810574da9df6e98998939b07d1ec0c8b0e2f1
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 0.9998

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://bologen.ru/strik?utm_term=high+resolution+clarence+larkin+charts PDF link annotation
    • https://cdn.sqhk.co/rigizisojix/Q35ggMU/fesuma.pdfIn PDF document text
    • http://gomesuzos.mypressonline.com/los_anunnaki_completo.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/telecharger_al_quran_al_karim.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/uji_mutiara_boraks_dan_uji_nyala.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gdiijjT/jasaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/jcTjfUa/projectm_music_visualizer_pro_7._2_apk.pdfIn PDF document text
    • http://leoidet.xyz/kokoradilobufimolejog8ylo.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/pdf_reader_and_annotator_android.pdfIn PDF document text
    • http://rewita.fun/partitura_careless_whisper_saxo_altoj9bpv.pdfIn PDF document text
    • http://atelier-spb.com/shoprider_streamer_wheelchair8f56p.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hg2hagf/golden_star_theaters_hermitage_pa.pdfIn PDF document text
    • http://luloxijemise.medianewsonline.com/59103501752.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/fasomusogapovi/45744399229.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_31cd24a976664b75abb81ed03f66e3ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/ayuntamiento_valencia_informacion_urbanistica.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_1e97e4025fcb451a8072bb95b7557ad6.pdf?index=trueIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_ec7e251bf59143f8b30753577b17b90b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/busqueda_de_informacion_en_internet_gestion.pdfIn PDF document text
    • http://zibevili.onlinewebshop.net/zawivez.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 5088 bytes
SHA-256: 0c38be3d4ecb98b040333faf863fcd9f26b7766b3d2cccfde026e02c87906293
font_01_sfnt_off0000fac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 11412 bytes
SHA-256: 42dc2322b6a6da61330fbe212835bc184d589c036a10f37b7728ff038b8924e3

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