Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4092db5e509e9fd…

MALICIOUS

PDF

67.9 KB Created: 2021-03-24 00:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 22ace7b9b58bdca744c1decf7c9192a9 SHA-1: aaf0b61db51edb336d4c55d7d9ffba524a37857c SHA-256: e4092db5e509e9fde62636cea16b55d47c6b5ac838c9d22c3782ef9b49a017b7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure for a 'jelly bean taste test worksheet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=jelly+bean+taste+test+worksheet PDF link annotation
    • https://cdn.sqhk.co/sifalavuxozo/6jjhbhi/xmeye_dvr_password_reset.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/clXjfgh/mini_golf_las_vegas.pdfIn PDF document text
    • https://lebosipob.weebly.com/uploads/1/3/4/0/134040403/pigakavikoxa-tuvon.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/mapikijutulijixo.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/heYgfbs/in_car_camera_racing_videos.pdfIn PDF document text
    • http://logvoz.ru/40419218946oi2aw.pdfIn PDF document text
    • http://chempion.coffee/capstan_and_turret_lathe_notessbvsa.pdfIn PDF document text
    • http://tabikola.online/meilleur_jeu_de_carte_3_joueursjrim5.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/lNjb5Sx/s._o._s_emergencias_medicas_srl_obera_misiones.pdfIn PDF document text
    • http://pressit.fun/22208199132f92pu.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/hiYlidl/vowomebezukepijijafexuze.pdfIn PDF document text
    • http://storeeu.info/computer_networking_a_top_down_approach_lecture_slidese0m3v.pdfIn PDF document text
    • http://openplafond.xyz/el_libro_de_la_interpretacion_de_los_sueos_artemidoromjff5.pdfIn PDF document text
    • http://biotringel.shop/playmobil_dollhouse_take_along_modern_doll_houseb8u6y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a6b229-edb9-4d7f-ae89-0e606e1c0fb6/xevejovonepeketax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b174a19-575a-48a8-96a4-da44443c6c2e/rawememosurejidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6ae895-e5d0-4416-b4c3-05f90de10a0e/sajobenaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1fd689-dfce-4eee-9502-ca39e28b92df/99862825462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00118d7-75b4-4e87-8040-2fe960c56655/foduvexapazabugakemamupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee82209f-8f6e-413a-bd20-937511ec386e/93689698103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3989bf6-138c-468d-9a12-1504b8bca117/susemixukitotamenivim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19628f41-a913-4521-9997-5135febafa4c/73793285764.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_off0000cf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF63 5160 bytes
SHA-256: ac1a52598863a7eb0658a1722834b2e4b3806225f273f3495bfc2036eb8b5afe
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 9868 bytes
SHA-256: 26fa640bd48243d6f7bd2f3906ca86b148cc96ab5d020440b5ce2101a4c5003c