Malicious PDF — malware analysis report

Static analysis result for SHA-256 124848b19ca0f6a1…

MALICIOUS

PDF

74.3 KB Created: 2021-03-21 06:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6a21297b2a127bfa425dcad1872ae0c SHA-1: 50cbee312b52abea0bc599490ece36f17beff309 SHA-256: 124848b19ca0f6a1741b225872ddb251d1093cd382fe50f1ce4249498ea17017
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to other PDF documents hosted on various domains, some of which are disposable. This technique is often used for SEO manipulation or to distribute further malicious content, aligning with the 'Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://soxebez.ru/123?utm_term=chiara+boni+size+guide
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/4989845.pdf
    • https://bazigumaxofiz.weebly.com/uploads/1/3/5/3/135383162/gimolirefa.pdf
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/bivazo.pdf
    • https://xabanovodo.weebly.com/uploads/1/3/0/7/130739860/25fbb669.pdf
    • https://jurijibo.weebly.com/uploads/1/3/0/8/130874645/xamox.pdf
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/aa46e8552.pdf
    • https://xusudunegowubub.weebly.com/uploads/1/3/0/7/130739081/18581dd77250.pdf
    • https://cdn.sqhk.co/xojelumegasi/hhjgdN2/xikutewikeriwebugenip.pdf
    • https://dubiroki.weebly.com/uploads/1/3/1/4/131483307/67a56a8587c.pdf
    • https://jopulovi.weebly.com/uploads/1/3/4/2/134265775/dijib.pdf
    • https://cdn.sqhk.co/rasepotobami/xLhgidm/90135012007.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_306841b3c77b414591c4d513cdfd5eab.pdf?index=true
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_2d9b80bfe5784ea4b69fc7ca20eb61e2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ddacc63c-8ca3-4076-81bf-ee998036d6e7/88743957088.pdf
    • https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_ee88c06e07df4d24992547784798c576.pdf?index=true
    • http://kusugafunerepo.rf.gd/can_you_replace_beats_solo_3_ear_pads.pdf
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_aaa428eeadef4bb8a0f1a0a656356c29.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66a1f056-997e-4fe3-89a2-324483e51b01/1181270675.pdf
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_ddabc5be141d4628b39accc0a953a9dc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ed07a159-bafb-4c0b-986e-f7178d4e7d77/el_libro_de_los_muertos_pelicula_completa_en_espaol.pdf
    • http://nanojali.epizy.com/50568185021.pdf
    • http://kigizeme.epizy.com/91948677631.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b6.bin
c0e079b168c3aefad3d7c5fc0b76899fdf447b94d3226dd1a164265cab453c9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 5148 bytes
font_01_sfnt_off0000f62c.bin
c4a5a4e521ebc10fc655fb5647445a89ced7a3f049618e018df8912174c900a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 10580 bytes

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